File - Migrate avatarUrl > avatarFile on person (data migration + logic) + Attachment data migration (#17752)

- Migration command
    - Check IS_FILES_FIELD_MIGRATED:false
    - Check or create avatarFile field
    - Fetch all people with avatarUrl
           - Move (Copy/move) file in storage
           - Create core.file record
           - Update person record
           
    - bonus : attachment migration  : fullPath > file (same logic)
   
- BE logic
    - Add avatarFile field on person

- FE logic 
   - Adapt logic to upload on/display avatarFile data

The whole imageIdentifier logic will be done later

packages/twenty-server/src/engine/twenty-orm/field-operations/files-field-sync/files-field-sync.ts

@@ -134,6 +134,14 @@ export class FilesFieldSync {
       return null;
     }
 
+    const isModifyingFilesField = filesFields.some((filesField) =>
+      isDefined(updatePayload[filesField.name as keyof typeof updatePayload]),
+    );
+
+    if (!isModifyingFilesField) {
+      return null;
+    }
+
     if (existingRecords.length !== 1) {
       throw new TwentyORMException(
         `Cannot update multiple records with files field at once`,