feat(licenses): enhance API and database integration for checkout sessions

- Updated development server port in package.json to 4002.
- Introduced constants for website URLs based on environment.
- Refactored database connection logic to use drizzle with PostgreSQL.
- Added new API endpoint for creating checkout sessions with Stripe integration.
- Implemented utility function to generate Stripe items based on license type and quantity.
- Updated existing API routes to use a router for better organization.

apps/licenses/src/validators/stripe.ts

@@ -0,0 +1,7 @@
+import { z } from "zod";
+
+export const createCheckoutSessionSchema = z.object({
+	type: z.enum(["basic", "premium", "business"]),
+	serverQuantity: z.number().min(1),
+	isAnnual: z.boolean(),
+});