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/prisma/seed/users.ts

@@ -0,0 +1,34 @@
+import { hashSync } from '@documenso/lib/server-only/auth/hash';
+
+import { prisma } from '..';
+
+type SeedUserOptions = {
+  name?: string;
+  email?: string;
+  password?: string;
+  verified?: boolean;
+};
+
+export const seedUser = async ({
+  name = `user-${Date.now()}`,
+  email = `user-${Date.now()}@test.documenso.com`,
+  password = 'password',
+  verified = true,
+}: SeedUserOptions = {}) => {
+  return await prisma.user.create({
+    data: {
+      name,
+      email,
+      password: hashSync(password),
+      emailVerified: verified ? new Date() : undefined,
+    },
+  });
+};
+
+export const unseedUser = async (userId: number) => {
+  await prisma.user.delete({
+    where: {
+      id: userId,
+    },
+  });
+};