Relation picker module (#335)

- Created a relation picker module
- Added a CustomeEntityForSelect type

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

@@ -1,10 +1,9 @@
-import { EntityForSelect } from '@/comments/components/MultipleEntitySelect';
+import { EntityForSelect } from '@/relation-picker/types/EntityForSelect';
 
-export function flatMapAndSortEntityForSelectArrayOfArrayByName(
-  entityForSelectArray: EntityForSelect[][],
-) {
-  const sortByName = (a: EntityForSelect, b: EntityForSelect) =>
-    a.name.localeCompare(b.name);
+export function flatMapAndSortEntityForSelectArrayOfArrayByName<
+  T extends EntityForSelect,
+>(entityForSelectArray: T[][]) {
+  const sortByName = (a: T, b: T) => a.name.localeCompare(b.name);
 
   return entityForSelectArray.flatMap((entity) => entity).sort(sortByName);
 }