306 implement multi relation picker for person and try to factorize relation picker (#319)

* Removed useless folder

* First working version

* Refactored MultipleEntitySelect and splitted into 2 components

* Added TODO

* Removed useless Query

* Fixed refetch

* Fixed naming

* Fix tests

---------

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

front/src/modules/ui/utils/flatMapAndSortEntityForSelectArrayByName.ts

@@ -0,0 +1,10 @@
+import { EntityForSelect } from '@/comments/components/MultipleEntitySelect';
+
+export function flatMapAndSortEntityForSelectArrayOfArrayByName(
+  entityForSelectArray: EntityForSelect[][],
+) {
+  const sortByName = (a: EntityForSelect, b: EntityForSelect) =>
+    a.name.localeCompare(b.name);
+
+  return entityForSelectArray.flatMap((entity) => entity).sort(sortByName);
+}