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.

packages/ee/server-only/limits/constants.ts

@@ -1,10 +1,15 @@
-import { TLimitsSchema } from './schema';
+import type { TLimitsSchema } from './schema';
 
 export const FREE_PLAN_LIMITS: TLimitsSchema = {
   documents: 5,
   recipients: 10,
 };
 
+export const TEAM_PLAN_LIMITS: TLimitsSchema = {
+  documents: Infinity,
+  recipients: Infinity,
+};
+
 export const SELFHOSTED_PLAN_LIMITS: TLimitsSchema = {
   documents: Infinity,
   recipients: Infinity,