Allow delete of LBRY/local content on DMCA page

Nobody has claimed this yet.

## The Issue
Similar to https://github.com/lbryio/lbry-desktop/issues/1719 but for downloaders. We should have the delete option available to users who have downloaded DMCA/copyright content and wish to delete it from LBRY/local drive.

The page should show the local path and a delete button if the file exists in file_list.

### Suggested Solutions
Tell us your suggested solutions if you have any.

## System Configuration

- LBRY Daemon version:
- LBRY App version:
- LBRY Installation ID:
- Operating system:

## Anything Else

## Screenshots

### Acceptance Criteria
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### Definition of Done
- [ ] Tested against acceptance criteria
- [ ] Tested against the assumptions of the user story
- [ ] The project builds without errors
- [ ] Unit tests are written and passing
- [ ] Tests on devices/browsers listed in the issue have passed
- [ ] QA performed & issues resolved
- [ ] Refactoring completed
- [ ] Any configuration or build changes documented
- [ ] Documentation updated
- [ ] Peer Code Review performed

Start at the DMCA page and compare its intended behavior with issue 1719, then trace how downloaded entries are represented in file_list. Confirm how the local path is exposed and how existing project tests cover file actions. Done means existing local content shows its path and a delete option, while the project still builds and tests pass.

Written by the indexing model from the issue text.