Files field - add files field display and input + filtering (#17637)

This PR introduces a new FILES field type for Twenty CRM, allowing users
to attach multiple files to any record.

- Files field display
- Files field preview
- Files field input
- Files field filtering

To test : 
1/ need to activate feature flag `IS_FILES_FIELD_ENABLED` + create a new
FILES field

- display in read only, edit, inline, table
- edit
- filter
- export


closes https://github.com/twentyhq/core-team-issues/issues/2154


<img width="354" height="134" alt="Screenshot 2026-02-02 at 19 11 01"
src="https://github.com/user-attachments/assets/3c3de89e-f6b6-4526-b710-e4c7ee1a6d30"
/>
<img width="1081" height="933" alt="Screenshot 2026-02-02 at 19 10 41"
src="https://github.com/user-attachments/assets/7c9a7278-edb7-4d4a-882c-f7404689d011"
/>
<img width="1073" height="719" alt="Screenshot 2026-02-02 at 19 10 33"
src="https://github.com/user-attachments/assets/79cc372b-56a2-4cbf-b4fe-023adc4753a8"
/>

packages/twenty-server/src/engine/core-modules/feature-flag/enums/feature-flag-key.enum.ts

@@ -19,5 +19,4 @@ export enum FeatureFlagKey {
   IS_SSE_DB_EVENTS_ENABLED = 'IS_SSE_DB_EVENTS_ENABLED',
   IS_COMMAND_MENU_ITEM_ENABLED = 'IS_COMMAND_MENU_ITEM_ENABLED',
   IS_NAVIGATION_MENU_ITEM_ENABLED = 'IS_NAVIGATION_MENU_ITEM_ENABLED',
-  IS_FILES_FIELD_ENABLED = 'IS_FILES_FIELD_ENABLED',
 }

packages/twenty-server/src/engine/core-modules/record-crud/zod-schemas/field-filters.zod-schema.ts

@@ -477,6 +477,7 @@ export const generateFieldFilterZodSchema = (
       return null;
 
     case FieldMetadataType.RAW_JSON:
+    case FieldMetadataType.FILES:
       return z
         .object({
           eq: z.string().optional().describe('Raw JSON equals'),