Enhance accessibility and improve form semantics across multiple pages

- Added `htmlFor` attributes to labels for better accessibility in Calendar, Dashboard, GuestJoin, Login, Register, RoomDetail, and Settings pages.
- Included `aria-hidden` attributes for icons to improve screen reader experience.
- Set `autoComplete` attributes for input fields to enhance user experience during form filling.
- Implemented `role` and `aria` attributes for radio groups and buttons to improve accessibility compliance.

src/i18n/de.json

@@ -23,7 +23,9 @@
     "protected": "Geschützt",
     "live": "Live",
     "error": "Fehler",
-    "success": "Erfolg"
+    "success": "Erfolg",
+    "gridView": "Rasteransicht",
+    "listView": "Listenansicht"
   },
   "nav": {
     "dashboard": "Dashboard",

src/i18n/en.json

@@ -23,7 +23,9 @@
     "protected": "Protected",
     "live": "Live",
     "error": "Error",
-    "success": "Success"
+    "success": "Success",
+    "gridView": "Grid view",
+    "listView": "List view"
   },
   "nav": {
     "dashboard": "Dashboard",