feat(billing): integrate Stripe for subscription management and billing access

- Added billing-related fields to the User model in the database.
- Implemented functions for managing billing access, including trial periods and subscription statuses.
- Created new billing utility functions for Stripe integration.
- Updated onboarding page to include billing overview and workspace creation eligibility.
- Enhanced route access checks to require billing access for certain actions.
- Implemented cleanup scripts for expired billing workspaces and associated media.
- Updated header component to conditionally show app navigation based on billing access.
- Added new migrations for billing-related database changes.

app/(dashboard)/layout.tsx

@@ -1,5 +1,6 @@
 import { Header } from '@/components/layout';
 import { auth } from '@/lib/auth';
+import { hasAppNavigationAccess } from '@/lib/route-access';
 
 export default async function DashboardLayout({
   children,
@@ -7,10 +8,13 @@ export default async function DashboardLayout({
   children: React.ReactNode;
 }) {
   const session = await auth();
+  const showAppNavigation = session?.user?.id
+    ? await hasAppNavigationAccess(session.user.id)
+    : false;
 
   return (
     <div className="relative flex min-h-screen flex-col">
-      <Header user={session?.user ?? null} />
+      <Header user={session?.user ?? null} showAppNavigation={showAppNavigation} />
       <main className="flex-1">{children}</main>
     </div>
   );