Improve the frontend (API v2 functionalities) (#18)

* Fix line number height issue

* Fix notification container position

* Remove line wrapping

* Switch to the new API

* Rework JS & implement paste editing

* Implement paste reports

* Document the report webhook

web/assets/js/app.js

@@ -0,0 +1,5 @@
+import * as Spinner from "./modules/spinner.js";
+import * as State from "./modules/state.js";
+
+// Initialize the application state
+Spinner.surround(State.initialize);