🐛(app-desk) add next-env.d.ts

next-env.d.ts lot of types for the next.js.
next.js boilerplate don't version the
next-env.d.ts file, so it was being ignored by git.
This was causing the CI to fail with the ts linter.

src/frontend/apps/desk/next-env.d.ts

@@ -0,0 +1,5 @@
+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/basic-features/typescript for more information.