Move capitalize into twenty-shared (#9414)

capitalize had been moved into twenty-shared. Let's remove the
duplicates in server and front !

packages/twenty-shared/src/utils/strings/capitalize.util.ts

@@ -0,0 +1,7 @@
+import { isNonEmptyString } from '@sniptt/guards';
+
+export const capitalize = (stringToCapitalize: string) => {
+  if (!isNonEmptyString(stringToCapitalize)) return '';
+
+  return stringToCapitalize[0].toUpperCase() + stringToCapitalize.slice(1);
+};