Update IOs to Logger.debug.
Stub Bot GenServer plumbing.
Fix/refx Signal path/item. Add peer-level Castle GenServer boost? to Castle.x signals.
Fix Item. Add/stub Cake and Hug.
Add basic Plug splash signal/result output.
Add URL-based signal search/exe.
Cleanup Castle.Plug.
Test and cleanup Castle signal and exe + bang methods.
Clean repo. Update logger.