Enabled recommended-requiring-type-checking as result type fixes provided (#632)

* Enabled recommended-requiring-type-checking

* from .cjs to .js

* check

* check

* check

* check

* A lot of types aligned and refactored

* More strict types

* Improvement

* Improvements

* Improvements

* Fixed routs

* Fixed import types

frontend/tsconfig.node.json

@@ -3,7 +3,9 @@
     "composite": true,
     "module": "ESNext",
     "moduleResolution": "bundler",
-    "allowSyntheticDefaultImports": true
+    "allowSyntheticDefaultImports": true,
+    "isolatedModules": true,
+    "strict": true
   },
   "include": ["vite.config.ts"]
 }