feat(deployer): skip sync on localhost and complete skill READMEs

Redeploy locally with docker compose when the node is 127.0.0.1 and
the image already exists. Make list/sync/remote/deb importable under
python3 -I -S. Add human README.md for every builtin skill, slim ack's
user-facing docs, and drop unused OpenSpec config.

skills/deployer/scripts/deploy/deb.py

@@ -31,7 +31,11 @@ import subprocess
 import sys
 from pathlib import Path
 
-from lib import (
+_SCRIPT_DIR = Path(__file__).resolve().parent
+if str(_SCRIPT_DIR) not in sys.path:
+    sys.path.insert(0, str(_SCRIPT_DIR))
+
+from lib import (  # noqa: E402
     project_root,
     run_remote,
     scp_base_args,