feat: integrate two factor authentication (#626)

* feat: integrate SNJS MFA with web

* fix: create rudimentary typings file for qrcode.react

* chore: lint fixes

* fix: address PR feedback

* fix: address PR feedback

* fix: address PR feedback 2

* fix: replace spread props on TwoFactorAuthWrapper component

* chore: change null check to undefined check

app/assets/javascripts/ui_models/app_state/notes_state.ts

@@ -172,7 +172,7 @@ export class NotesState {
     } else {
       this.activeEditor.setNote(note);
     }
-    
+
     this.appState.noteTags.reloadTags();
     await this.onActiveEditorChanged();