Feat/error boundaries (#2779)

* - Changed to objectNameSingular always defined
- Added ErrorCatchAll

* - Added mock mode for companies logged out
- Added a proper ErrorBoundary component

* Removed react-error-boundary

* Implemented proper ErrorBoundary

* Fixes

* Change strategy about mocks

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

front/src/utils/string/capitalize.ts

@@ -2,5 +2,6 @@ import { isNonEmptyString } from '@sniptt/guards';
 
 export const capitalize = (stringToCapitalize: string) => {
   if (!isNonEmptyString(stringToCapitalize)) return '';
+
   return stringToCapitalize[0].toUpperCase() + stringToCapitalize.slice(1);
 };