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/lib/server-only/team/delete-team.ts

@@ -0,0 +1,42 @@
+import { prisma } from '@documenso/prisma';
+
+import { AppError } from '../../errors/app-error';
+import { stripe } from '../stripe';
+
+export type DeleteTeamOptions = {
+  userId: number;
+  teamId: number;
+};
+
+export const deleteTeam = async ({ userId, teamId }: DeleteTeamOptions) => {
+  await prisma.$transaction(async (tx) => {
+    const team = await tx.team.findFirstOrThrow({
+      where: {
+        id: teamId,
+        ownerUserId: userId,
+      },
+      include: {
+        subscription: true,
+      },
+    });
+
+    if (team.subscription) {
+      await stripe.subscriptions
+        .cancel(team.subscription.planId, {
+          prorate: false,
+          invoice_now: true,
+        })
+        .catch((err) => {
+          console.error(err);
+          throw AppError.parseError(err);
+        });
+    }
+
+    await tx.team.delete({
+      where: {
+        id: teamId,
+        ownerUserId: userId,
+      },
+    });
+  });
+};