refactor: split backend by context instead of type 'controllers/models/...'

app/shared_collections/validators/shared_collection.ts

@@ -0,0 +1,8 @@
+import { params } from '#core/validators/params_object';
+import vine from '@vinejs/vine';
+
+export const getSharedCollectionValidator = vine.compile(
+	vine.object({
+		params,
+	})
+);