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/onboarding/page.tsx

@@ -1,4 +1,5 @@
 import { auth } from '@/lib/auth';
+import { buildBillingAccessWhereInput, getBillingOverview } from '@/lib/billing';
 import { db } from '@/lib/db';
 import { redirect } from 'next/navigation';
 import { OnboardingWizard } from './onboarding-wizard';
@@ -9,10 +10,28 @@ export default async function OnboardingPage() {
         redirect('/login');
     }
 
-    const user = await db.user.findUnique({
-        where: { id: session.user.id },
-        select: { onboardingCompletedAt: true, name: true, email: true },
-    });
+    const [user, billing, creatableWorkspaces] = await Promise.all([
+        db.user.findUnique({
+            where: { id: session.user.id },
+            select: { onboardingCompletedAt: true, name: true, email: true },
+        }),
+        getBillingOverview(session.user.id),
+        db.workspace.findMany({
+            where: {
+                owner: buildBillingAccessWhereInput(),
+                OR: [
+                    { ownerId: session.user.id },
+                    { members: { some: { userId: session.user.id, role: 'ADMIN' } } },
+                ],
+            },
+            select: {
+                id: true,
+                name: true,
+                ownerId: true,
+            },
+            orderBy: { name: 'asc' },
+        }),
+    ]);
 
     if (user?.onboardingCompletedAt) {
         redirect('/dashboard');
@@ -20,5 +39,15 @@ export default async function OnboardingPage() {
 
     const userName = user?.name || user?.email?.split('@')[0] || 'there';
 
-    return <OnboardingWizard userName={userName} />;
+    return (
+        <OnboardingWizard
+            userName={userName}
+            canCreateWorkspace={billing.workspaceCreation.canCreateWorkspace}
+            availableWorkspaces={creatableWorkspaces.map((workspace) => ({
+                id: workspace.id,
+                name: workspace.name,
+                isOwner: workspace.ownerId === session.user.id,
+            }))}
+        />
+    );
 }