- Add run subcommand dispatching via dorks.Runner (github live,
other sources wrapped into friendly ErrSourceNotImplemented)
- Add add subcommand with source/category validation and embedded
ID collision guard
- Add delete subcommand that refuses embedded dork ids
- Expose newGitHubExecutor as package var for test injection
- cmd/dorks_test.go covers list filtering, add persistence + list
merge marker, invalid source rejection, embedded collision,
embedded delete refusal, custom delete, shodan not-implemented
path, GitHub missing-token auth hint, fake executor run, yaml
export merge, and info for both origins
Completes DORK-03 (list/run/add/export/info/delete) and DORK-04
(--source/--category filtering).
