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.

apps/web/src/app/(unauthenticated)/signup/page.tsx

@@ -3,6 +3,7 @@ import Link from 'next/link';
 import { redirect } from 'next/navigation';
 
 import { IS_GOOGLE_SSO_ENABLED } from '@documenso/lib/constants/auth';
+import { decryptSecondaryData } from '@documenso/lib/server-only/crypto/decrypt';
 
 import { SignUpForm } from '~/components/forms/signup';
 
@@ -10,11 +11,24 @@ export const metadata: Metadata = {
   title: 'Sign Up',
 };
 
-export default function SignUpPage() {
+type SignUpPageProps = {
+  searchParams: {
+    email?: string;
+  };
+};
+
+export default function SignUpPage({ searchParams }: SignUpPageProps) {
   if (process.env.NEXT_PUBLIC_DISABLE_SIGNUP === 'true') {
     redirect('/signin');
   }
 
+  const rawEmail = typeof searchParams.email === 'string' ? searchParams.email : undefined;
+  const email = rawEmail ? decryptSecondaryData(rawEmail) : null;
+
+  if (!email && rawEmail) {
+    redirect('/signup');
+  }
+
   return (
     <div>
       <h1 className="text-4xl font-semibold">Create a new account</h1>
@@ -24,7 +38,11 @@ export default function SignUpPage() {
         signing is within your grasp.
       </p>
 
-      <SignUpForm className="mt-4" isGoogleSSOEnabled={IS_GOOGLE_SSO_ENABLED} />
+      <SignUpForm
+        className="mt-4"
+        initialEmail={email || undefined}
+        isGoogleSSOEnabled={IS_GOOGLE_SSO_ENABLED}
+      />
 
       <p className="text-muted-foreground mt-6 text-center text-sm">
         Already have an account?{' '}