Move frontend to main folder (#109)

* feat: small refactor

* fix: appimage build script

* fix: add NO_STRIP to AppImage build

* fix: build and dev mode from refactor

* fix: submodule step 1

* fix: submodules step 2

main/plugins/global-error-handler.ts

@@ -0,0 +1,11 @@
+export default defineNuxtPlugin((nuxtApp) => {
+  // Also possible
+  /*
+  nuxtApp.hook("vue:error", (error, instance, info) => {
+    
+    console.error(error, info);
+    const router = useRouter();
+    router.replace(`/error`);
+  });
+  */
+});