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

.agents/skills/lib_py/agents/registry.py

@@ -5,14 +5,12 @@ from lib_py.agents.base import BaseAgentAdapter
 from lib_py.agents.adapters.claude import ClaudeAgentAdapter
 from lib_py.agents.adapters.agy import AgyAgentAdapter
 from lib_py.agents.adapters.hermes import HermesAgentAdapter
-from lib_py.agents.adapters.cline import ClineAgentAdapter
 from lib_py.agents.adapters.grok import GrokAgentAdapter
 
 _ADAPTERS: Dict[str, BaseAgentAdapter] = {
     'claude': ClaudeAgentAdapter(),
     'agy': AgyAgentAdapter(),
     'hermes': HermesAgentAdapter(),
-    'cline': ClineAgentAdapter(),
     'grok': GrokAgentAdapter(),
 }