feat: initial i18n marketing implementation (#1223)

## Description

This PR introduces an initial i18n implementation using
[Lingui](https://lingui.dev).

We plan to combine it with Crowdin which will provide AI translations
when PRs are merged into main.

We plan to rollout i18n to only marketing for now, and will review how
everything goes before continuing to introduce it into the main
application.

## Reasoning

Why not use i18n-next or other alternatives?

To hopefully provide the best DX we chose Lingui because it allows us to
simply wrap text that we want to translate in tags, instead of forcing
users to do things such as:

- Update the text to `t('some-text')`
- Extract it to the file
- The text becomes a bit unreadable unless done correctly

Yes, plugins such as i18n-ally and Sherlock exist to simplify these
chores, but these require the user to be correctly setup in vscode, and
it also does not seem to provide the required configurations for our
multi app and multi UI package setup.

## Super simple demo

```html
// Before
<p>Text to update</p>

// After
<p>
  <Trans>Text to update</Trans>
</p>
```

## Related Issue

Relates to #885 but is only for marketing for now.

Another branch is slowly being prepared for the changes required for the
web application while we wait to see how this goes for marketing.

## Changes Made

Our configuration does not follow the general standard since we have
translations that cross:
- Web app
- Marketing app
- Constants package
- UI package

This means we want to separate translations into:
1. Marketing - Only translations extracted from `apps/marketing`
2. Web - Only translations extracted from `apps/web`
3. Common - Translations from `packages/constants` and `packages/ui`

Then we bundle, compile and minify the translations for production as
follows:
1. Marketing = Marketing + Common
2. Web = Web + Common

This allows us to only load the required translations when running each
application.

Overall general changes: 
- Add i18n to marketing
- Add core i18n setup to web
- Add pre-commit hook and GH action to extract any new <Trans> tags into
the translation files

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit


- **New Features**
- Added Romanian localization for marketing messages to improve
accessibility for Romanian-speaking users.
- Introduced German and English translation modules and PO files to
enhance the application's internationalization capabilities.
- Integrated internationalization support in the RootLayout component
for dynamic language settings based on server-side configurations.
- Enhanced the Enterprise component with translation support to adapt to
user language preferences.
- Added a `<meta>` tag to prevent Google from translating the page
content, supporting internationalization efforts.

- **Bug Fixes**
- Resolved minor issues related to the structure and accessibility of
translation files.

- **Chores**
- Updated project dependencies to support the new localization features
and ensure stability.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Lucas Smith <me@lucasjamessmith.me>
Co-authored-by: Crowdin Bot <support+bot@crowdin.com>
Co-authored-by: github-actions <github-actions@documenso.com>

.github/workflows/translations-extract.yml

@@ -0,0 +1,38 @@
+# Extract and compile translations for all PRs.
+
+name: 'Extract and compile translations'
+
+on:
+  workflow_call:
+  pull_request:
+    branches: ['main']
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  extract_translations:
+    name: Extract and compile translations
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
+
+      - uses: ./.github/actions/node-install
+
+      - name: Extract and compile translations
+        run: |
+          npm run translate:extract
+          npm run translate:compile
+
+      - name: Check and commit any files created
+        run: |
+          git config --global user.name 'github-actions'
+          git config --global user.email 'github-actions@documenso.com'
+          git add packages/lib/translations
+          git diff --staged --quiet --exit-code || (git commit -m "chore: extract translations" && git push)

.github/workflows/translations-force-pull.yml

@@ -0,0 +1,51 @@
+# This is similar to the "Pull Translations" workflow, but without the conditional check to allow us to
+# forcefully pull down translations from Crowdin and create a PR regardless if all the translations are fulfilled.
+#
+# Intended to be used when we manually update translations in Crowdin UI and want to pull those down when
+# they already exist.
+
+name: 'Force pull translations'
+
+on:
+  workflow_dispatch:
+  workflow_call:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  pull_translations:
+    name: Force pull translations
+    runs-on: ubuntu-latest
+    environment: Translations
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - uses: ./.github/actions/node-install
+
+      - name: Pull translations from Crowdin
+        uses: crowdin/github-action@v2
+        with:
+          upload_sources: false
+          upload_translations: false
+          download_translations: true
+          export_only_approved: false
+          localization_branch_name: chore/translations
+          commit_message: 'chore: add translations'
+          pull_request_title: 'chore: add translations'
+
+        env:
+          # A classic GitHub Personal Access Token with the 'repo' scope selected (the user should have write access to the repository).
+          GITHUB_TOKEN: ${{ secrets.GH_PAT }}
+
+          # A numeric ID, found at https://crowdin.com/project/<projectName>/tools/api
+          CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
+
+          # Visit https://crowdin.com/settings#api-key to create this token
+          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}

.github/workflows/translations-pull.yml

@@ -3,11 +3,10 @@
 name: 'Pull translations'
 
 on:
+  schedule:
+    - cron: '0 */2 * * *' # Every two hours.
   workflow_dispatch:
   workflow_call:
-  # Cron disabled until i18n PR is landed.
-  # schedule:
-  #   - cron: '0 */2 * * *' # Every two hours.
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
@@ -17,6 +16,7 @@ jobs:
   pull_translations:
     name: Pull translations
     runs-on: ubuntu-latest
+    environment: Translations
     permissions:
       contents: write
       pull-requests: write
@@ -46,7 +46,7 @@ jobs:
 
         env:
           # A classic GitHub Personal Access Token with the 'repo' scope selected (the user should have write access to the repository).
-          GITHUB_TOKEN: ${{ secrets.GITHUB_CROWDIN_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GH_PAT }}
 
           # A numeric ID, found at https://crowdin.com/project/<projectName>/tools/api
           CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}

.github/workflows/translations-upload.yml

@@ -3,9 +3,8 @@ name: 'Extract and upload translations'
 on:
   workflow_dispatch:
   workflow_call:
-  # Disabled until i18n PR is landed.
-  # push:
-  #   branches: ['main']
+  push:
+    branches: ['main']
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
@@ -15,6 +14,7 @@ jobs:
   extract_translations:
     name: Extract and upload translations
     runs-on: ubuntu-latest
+    environment: Translations
     permissions:
       contents: write
     steps: