add option to disable keybindings fixing #1251 (#1254)

* add option to disable keybindings

* add tests for disabling keybindings

* Fixed translation keys

* Added env to env configuration list

* Removed useless tests

The tests are already enforced by type declarations

---------

Co-authored-by: Jan Böhmer <mail@jan-boehmer.de>

assets/js/register_events.js

@@ -27,7 +27,12 @@ class RegisterEventHelper {
     constructor() {
         this.registerTooltips();
         this.configureDropdowns();
-        this.registerSpecialCharInput();
+        
+        // Only register special character input if enabled in configuration
+        const keybindingsEnabled = document.body.dataset.keybindingsSpecialCharacters !== 'false';
+        if (keybindingsEnabled) {
+            this.registerSpecialCharInput();
+        }
 
         //Initialize ClipboardJS
         this.registerLoadHandler(() => {