chore: update @prisma/client to version 7.10.0 and add prisma.config.ts for configuration management

- Updated @prisma/client in shared package.json from ^6.0.0 to ^7.10.0.
- Modified stack.md to include generated Prisma client directory and Prisma CLI config file.
- Added prisma.config.ts for managing Prisma configuration, including datasource URL and migrations path.

apps/api/src/db/client.ts

@@ -1,3 +1,8 @@
-import { PrismaClient } from '@prisma/client'
+import { PrismaClient } from '../../prisma/generated/prisma/client'
+import { PrismaPg } from '@prisma/adapter-pg'
 
-export const prisma = new PrismaClient()
+const adapter = new PrismaPg({
+  connectionString: process.env.DATABASE_URL!,
+})
+
+export const prisma = new PrismaClient({ adapter })