/delete

Delete one or more issues and clean up all references.

Delete one or more issues and clean up all references.

## Safety Features

- **Preview mode**: Default shows what would be deleted
- **--force**: Required to actually delete
- **--dry-run**: Preview collision detection
- **Dependency checks**: Fails if issue has dependents (unless --cascade or --force)

## Batch Deletion

- Delete multiple: `bd delete bd-1 bd-2 bd-3 --force`
- Delete from file: `bd delete --from-file deletions.txt --force`

## Dependency Handling

- **Default**: Fails if issue has dependents not in deletion set
- **--cascade**: Recursively delete all dependent issues
- **-...