Add TypeScript type definitions for app components and layout

- Created type definitions for `auth`, `layout`, and `page` components to ensure type safety and consistency.
- Implemented checks for entry validity and prop types using utility types.
- Added a `package.json` file to specify module type for TypeScript compatibility.

app/frontend/.next/server/next-font-manifest.json

@@ -0,0 +1 @@
+{"pages":{},"app":{},"appUsingSizeAdjust":false,"pagesUsingSizeAdjust":false}