feat: add user defined translations (#1756)

* feat: add user defined translations

* add refetch key for translation (#1757)

---------

Co-authored-by: Alex Christoffer Rasmussen <ac@omnivox.dk>

apps/server/src/api-data/assets/assets.validation.ts

@@ -1,4 +1,14 @@
 import { body } from 'express-validator';
+
 import { requestValidationFunction } from '../validation-utils/validationFunction.js';
 
 export const validatePostCss = [body('css').isString().trim(), requestValidationFunction];
+
+export const validatePostTranslation = [
+  body('translation')
+    .custom((v) => v != null && typeof v === 'object' && !Array.isArray(v))
+    .withMessage('translation must be an object (key -> string)')
+    .bail(),
+  body('translation.*').isString().trim().notEmpty(),
+  requestValidationFunction,
+];