feat: add teams (#848)

## Description

Add support for teams which will allow users to collaborate on
documents.

Teams features allows users to:

- Create, manage and transfer teams
- Manage team members
- Manage team emails
- Manage a shared team inbox and documents

These changes do NOT include the following, which are planned for a
future release:

- Team templates
- Team API
- Search menu integration

## Testing Performed

- Added E2E tests for general team management
- Added E2E tests to validate document counts

## Checklist

- [X] I have tested these changes locally and they work as expected.
- [X] I have added/updated tests that prove the effectiveness of these
changes.
- [ ] I have updated the documentation to reflect these changes, if
applicable.
- [X] I have followed the project's coding style guidelines.

turbo.json

@@ -43,7 +43,6 @@
     "NEXT_PUBLIC_POSTHOG_KEY",
     "NEXT_PUBLIC_FEATURE_BILLING_ENABLED",
     "NEXT_PUBLIC_STRIPE_COMMUNITY_PLAN_MONTHLY_PRICE_ID",
-    "NEXT_PUBLIC_STRIPE_FREE_PLAN_ID",
     "NEXT_PUBLIC_DISABLE_SIGNUP",
     "NEXT_PUBLIC_DOCUMENT_SIZE_UPLOAD_LIMIT",
     "NEXT_PRIVATE_DATABASE_URL",