File field: "Create New File" functionality

[oidacra]

Parent Issue

#29691

Task

Implement the "Create New File" feature for File Field, which opens the content edit window for a new file while maintaining the state of the original content item.

Proposed Objective

User Experience

Proposed Priority

Same as Parent Issue

Acceptance Criteria

1. A "Create New File" option is available in the File field
2. Clicking the option opens the content edit window for a new file
3. The default content type for the new file is dotAsset
4. The state of the original content item is maintained
5. After saving the new file, the user is returned to the original content item
6. The newly created file is properly linked to the File field

Assumptions & Initiation Needs

• API for creating new content items (files) is available
• Design specifications for the content edit window are provided