refactor: validate objectMetadataItem with Zod on creation and update… (#4270)

* refactor: validate objectMetadataItem with Zod on creation and update & remove logic from useObjectMetadataItemForSettings

* refactor: review

packages/twenty-front/src/utils/validation-schemas/camelCaseStringSchema.ts

@@ -0,0 +1,8 @@
+import camelCase from 'lodash.camelcase';
+import { z } from 'zod';
+
+export const camelCaseStringSchema = z
+  .string()
+  .refine((value) => camelCase(value) === value, {
+    message: 'String should be camel case',
+  });