Add PayloadCMS type definitions, Prettier config, and PNPM lockfile

dev/app/(payload)/api/graphql/route.ts

@@ -0,0 +1,8 @@
+/* THIS FILE WAS GENERATED AUTOMATICALLY BY PAYLOAD. */
+/* DO NOT MODIFY IT BECAUSE IT COULD BE REWRITTEN AT ANY TIME. */
+import config from '@payload-config'
+import { GRAPHQL_POST, REST_OPTIONS } from '@payloadcms/next/routes'
+
+export const POST = GRAPHQL_POST(config)
+
+export const OPTIONS = REST_OPTIONS(config)