Files v2 - Add new FILES field type (#17236)

In this PR : 
- New field type FieldMetadataType.FILES added (as jsonb in DB)
- Backend: GraphQL types, validation, REST API schema, data processor
handling
- Frontend: field configuration in settings
- Feature flag IS_FILES_FIELD_ENABLED to gate the feature
- Integration tests for create/filter validation
- Dev seed: Feature flag enabled + FILES field on survey result object


To do in next PRs : 
- Backend : 
-- new workspaceFile controller (for download) & new workspaceFile
upload resolver (for upload)
-- pre-hook/post-hook to ensure fileId existence + listener to ensure
cleaning
- Frontend : FILES field display/edit in table view, record, ...

packages/twenty-front/src/modules/ui/field/display/components/FilesDisplay.tsx

@@ -0,0 +1,24 @@
+import { type FieldFilesValue } from '@/object-record/record-field/ui/types/FieldMetadata';
+import { ExpandableList } from '@/ui/layout/expandable-list/components/ExpandableList';
+import { t } from '@lingui/core/macro';
+import { Chip, ChipVariant } from 'twenty-ui/components';
+
+type FilesDisplayProps = {
+  value: FieldFilesValue;
+};
+
+//TODO: Draft version, UI to be improved
+export const FilesDisplay = ({ value }: FilesDisplayProps) => {
+  return (
+    <ExpandableList>
+      {value?.map((file, index) => (
+        <Chip
+          key={`${file.fileId}-${index}`}
+          variant={ChipVariant.Highlighted}
+          label={file.label}
+          emptyLabel={t`Untitled`}
+        />
+      ))}
+    </ExpandableList>
+  );
+};