BREAKING: aipass.routing renamed to aipass.drone. Routing IS drone —
the command routing engine IS the CLI command center. No reason to
keep them separate.
Adds `drone` CLI entry point:
drone systems — list registered branches
drone @branch command — route command to branch
drone @branch --help — get branch help
drone --version — show version
406 tests pass (20 new CLI tests). All imports updated.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>