refactor: rename autobuild package and CLI to autohands

[Jammy2211]

Rename autobuild → autohands

Part of a coordinated 18-repo rename tracked in PyAutoHands#177. The Hands repo was renamed PyAutoBuild → PyAutoHands, but its payload package and CLI kept the old name; this closes that seam.

In this repo: AGENTS.md generate command, the navigator_check.yml comment, and the .navigator_check_ignore header.

⚠️ Merge order matters — this lands atomically, with no back-compat shim

1. PyAutoHands      (the package + CLI move)
2. PyAutoHeart      (workspace-validation.yml calls the moved paths)
3. PyAutoBrain      (resolver + policy + repo maps)
4. everything else  (workspaces, HowTos, assistants, Mind, admin_jammy)

The directory move breaks PyAutoHeart's workspace-validation.yml and every workspace's run_smoke.py the moment PyAutoHands merges. All 18 should merge in one pass, ideally while CI is quiet. That window is the accepted cost of landing without a shim.

Deliberately preserved

PyAutoBuild#NNN issue citations, the rhayes777/PyAutoBuild url_fixups patterns, the pyautobuild: pyautohands policy alias, pyautobuild_boundary_audit.md, ~150 PyAutoMind historical records, and the PYAUTOBUILD_DIR docstring describing a shim that no longer exists. autobuild is also kept as a back-compat router keyword in policy.yaml / _intake.py / _bug.py — those are typed keywords, not paths.

Verification (whole-branch)

• PyAutoHands 148 passed; PyAutoBrain 152 passed, 1 failed — test_skill_install (sizing wrapper), confirmed pre-existing on main.
• repos_sync.py --check matches the main baseline exactly. Not vacuous: FIREWALL_ALLOWLIST is keyed by real path, so a missed rename would surface all 13 moved modules as violations.
• bash -n clean on every moved shell script; autohands help renders.
• Every PyAutoHands/autohands/<module> reference in the workspace resolves to a real file.

🤖 Generated with Claude Code