File field: "Import from URL" functionality

[oidacra]

Parent Issue

#29691

Task

Implement the "Import from URL" feature for File Field, which opens a popup for users to enter a URL and import a file from that location.

Proposed Objective

User Experience

Proposed Priority

Same as Parent Issue

Acceptance Criteria

1. An "Import from URL" option is available in the File field
2. Clicking the option opens a popup with a URL input field
3. The system attempts to download and import the file from the provided URL
4. Error handling if the URL is invalid or the file cannot be imported
5. The popup remains open and displays an error message if the import fails
6. Successfully imported files are treated as if they were uploaded directly

Assumptions & Initiation Needs

• Backend API for importing files from URLs is available
• Security measures for URL validation and file scanning are in place