feat(agent): deprecate and completely remove cline agent support

- Delete adapters/cline.py and unregister from registry.py
- Remove cline branches from lib.sh and all 8 skill scripts (create, resume, stop, status, reconcile, update_yaml_resumed, resolve_session_id, orc_onboard)
- Narrow own-key mapping dictionaries across lib_py core modules to 4 supported agents
- Delete cline-exclusive tests and retarget shared fixtures to grok/hermes/claude
- Update skills documentation and installation guides (439 passed, 0 failures)
- Archive cline deprecation consensus and review reports

tests/test_o2_race_free_lock.py

@@ -23,7 +23,17 @@ def run_lock_cmd(action, marker_path, env=None):
 def acquire_bg(marker_path, sleep_secs=10):
     cmd = f"source '{LOCK_SCRIPT}' && mam_acquire_loop_lock '{marker_path}' && sleep {sleep_secs}"
     proc = subprocess.Popen(["bash", "-c", cmd], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
-    time.sleep(0.3)
+    for _ in range(40):
+        time.sleep(0.05)
+        if marker_path.is_file():
+            try:
+                content = marker_path.read_text()
+                if f"pid={proc.pid}" in content:
+                    break
+            except Exception:
+                pass
+        if proc.poll() is not None:
+            break
     return proc