MBS-13687: Auto-fill work search box with recording name

[SHREESHANTH99]

Problem

When adding a recording–work relationship, the user has to manually type the work name again.
This slows down editing and is inconsistent with the release relationship editor.

Solution

Automatically pre-fill the work search field with the recording’s name when:

• the source entity is a recording, and
• the target entity type is work.

This improves speed and keeps behavior consistent with the release relationship editor.

Screenshot

Testing

Tested locally by:

• Creating a new recording–work relationship
• Opening the relationship dialog
• Confirming the work search field is auto-filled with the recording’s name
• Verifying that no other relationship types are affected

[welcome]

Thanks for opening your first pull request for MusicBrainz Server, and welcome to our community! 🎉
If you haven’t yet, please check out our contributing guidelines.
Someone will be reviewing your PR soon; just hang in there!
In the meantime, if you’re wondering what to do next, you can have a look at our issue tracker.