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/admin/layout.tsx

@@ -17,7 +17,7 @@ export default async function AdminLayout({
 
     return (
         <div className="relative flex min-h-screen flex-col">
-            <Header user={session.user} />
+            <Header user={session.user} showAppNavigation />
             <div className="w-full px-4 md:px-8 flex-1 items-start md:grid md:grid-cols-[220px_minmax(0,1fr)] md:gap-6 lg:grid-cols-[240px_minmax(0,1fr)] lg:gap-10">
                 {/* Mobile Nav */}
                 <div className="md:hidden py-4 border-b mb-4">