fix: refactor dates (#1321)

## Description

Refactor the current date formatting system to utilize Lingui.

## Changes Made

- Remove redundant `LocaleData` component with Lingui dates

## Important notes

For the internal pages for certificates, default to en-US to format any
dates.

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


- **New Features**
- Enhanced internationalization support across various components by
utilizing the `i18n` object for date formatting.
- Streamlined locale management by removing cookie-based language
handling and adopting a more centralized approach.

- **Bug Fixes**
- Improved date formatting consistency by replacing the `LocaleDate`
component with direct calls to `i18n.date()` in multiple components.

- **Documentation**
- Updated localization strings in the `web.po` files to reflect recent
changes in the source code structure.

- **Chores**
- Minor formatting adjustments and code organization improvements across
various files to enhance readability and maintainability.

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

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Co-authored-by: github-actions <github-actions@documenso.com>

packages/lib/constants/i18n.ts

@@ -6,9 +6,22 @@ export const ZSupportedLanguageCodeSchema = z.enum(SUPPORTED_LANGUAGE_CODES).cat
 
 export type SupportedLanguageCodes = (typeof SUPPORTED_LANGUAGE_CODES)[number];
 
+export type I18nLocaleData = {
+  /**
+   * The supported language extracted from the locale.
+   */
+  lang: SupportedLanguageCodes;
+
+  /**
+   * The preferred locales.
+   */
+  locales: string[];
+};
+
 export const APP_I18N_OPTIONS = {
   supportedLangs: SUPPORTED_LANGUAGE_CODES,
   sourceLang: 'en',
+  defaultLocale: 'en-US',
 } as const;
 
 type SupportedLanguage = {