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/utils/convert-object-metadata-to-schema-properties.util.ts

@@ -1,6 +1,5 @@
 import {
   FieldMetadataType,
-  FILE_CATEGORIES,
   NumberDataType,
   type FieldMetadataSettings,
 } from 'twenty-shared/types';
@@ -346,9 +345,11 @@ export const convertObjectMetadataToSchemaProperties = ({
               },
               ...(forResponse
                 ? {
-                    fileCategory: {
+                    extension: {
+                      type: 'string',
+                    },
+                    url: {
                       type: 'string',
-                      enum: Object.values(FILE_CATEGORIES),
                     },
                   }
                 : {}),