[MM-49996] Add /call recording slash command (#7062)

* Add  slash command

* Fix alert

* Implement alert for recording errors

* Default locked

assets/base/i18n/en.json

@@ -414,6 +414,8 @@
   "mobile.calls_error_title": "Error",
   "mobile.calls_host": "host",
   "mobile.calls_host_rec": "You are recording this meeting. Consider letting everyone know that this meeting is being recorded.",
+  "mobile.calls_host_rec_error": "Please try to record again. You can also contact your system admin for troubleshooting help.",
+  "mobile.calls_host_rec_error_title": "Something went wrong with the recording",
   "mobile.calls_host_rec_stopped": "You can find the recording in this call's chat thread once it's finished processing.",
   "mobile.calls_host_rec_stopped_title": "Recording has stopped. Processing...",
   "mobile.calls_host_rec_title": "You are recording",
@@ -445,6 +447,10 @@
   "mobile.calls_react": "React",
   "mobile.calls_rec": "rec",
   "mobile.calls_record": "Record",
+  "mobile.calls_recording_start_in_progress": "A recording is already in progress.",
+  "mobile.calls_recording_start_no_permissions": "You don't have permissions to start a recording. Please ask the call host to start a recording.",
+  "mobile.calls_recording_stop_no_permissions": "You don't have permissions to stop the recording. Please ask the call host to stop the recording.",
+  "mobile.calls_recording_stop_none_in_progress": "No recording is in progress.",
   "mobile.calls_request_message": "Calls are currently running in test mode and only system admins can start them. Reach out directly to your system admin for assistance",
   "mobile.calls_request_title": "Calls is not currently enabled",
   "mobile.calls_see_logs": "See server logs",