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

app/collections/validators/update_collection_validator.ts

@@ -0,0 +1,14 @@
+import { Visibility } from '#collections/enums/visibility';
+import { params } from '#core/validators/params_object';
+import vine from '@vinejs/vine';
+
+export const updateCollectionValidator = vine.compile(
+	vine.object({
+		name: vine.string().trim().minLength(1).maxLength(254),
+		description: vine.string().trim().maxLength(254).nullable(),
+		visibility: vine.enum(Visibility),
+		nextId: vine.number().optional(),
+
+		params,
+	})
+);