Add hot-update files for layout and webpack with eval-source-map configuration

- Created multiple hot-update JavaScript files for app layout and webpack.
- Each file includes a warning about the use of "eval-source-map" for development purposes.
- Added source mapping for CSS files in the app layout.
- Generated corresponding hot-update JSON files to manage module updates.

app/frontend/.next/static/webpack/904051da550a6daf.webpack.hot-update.json

@@ -0,0 +1 @@
+{"c":["app/layout","webpack"],"r":["app/_not-found/page"],"m":["(app-pages-browser)/./node_modules/next/dist/build/webpack/loaders/next-client-pages-loader.js?absolutePagePath=C%3A%5CUsers%5CRaymondVerhoef%5CGitea%5Clearning-platform%5Capp%5Cfrontend%5Cnode_modules%5Cnext%5Cdist%5Cclient%5Ccomponents%5Cnot-found-error.js&page=%2F_not-found%2Fpage!","(app-pages-browser)/./node_modules/next/dist/client/components/not-found-error.js"]}