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_tier1_unit.py

@@ -960,18 +960,18 @@ def test_grok_shell_and_scripts_integration(mam_sandbox):
     lib_path = mam_sandbox / "skills" / "lib.sh"
     lib_content = lib_path.read_text()
     assert '*-creator-grok|*-planner-grok|*-reviewer-grok)      kind="grok"' in lib_content
-    assert "'claude', 'agy', 'hermes', 'cline', 'grok'" in lib_content
+    assert "'claude', 'agy', 'hermes', 'grok'" in lib_content
     assert '[[ "$sess" =~ "grok" ]]' in lib_content
 
     # 2. create_session.sh validation
     create_path = mam_sandbox / "skills" / "multi-agent-mux-create" / "scripts" / "create_session.sh"
     create_content = create_path.read_text()
-    assert 'claude|agy|hermes|cline|grok)' in create_content
+    assert 'claude|agy|hermes|grok)' in create_content
 
     # 3. stop_session.sh validation & state capture
     stop_path = mam_sandbox / "skills" / "multi-agent-mux-stop" / "scripts" / "stop_session.sh"
     stop_content = stop_path.read_text()
-    assert 'claude|agy|hermes|cline|grok)' in stop_content
+    assert 'claude|agy|hermes|grok)' in stop_content
     assert "target['grok_session_id_own'] = captured" in stop_content
 
     # 4. workspace_uuid OWN_KEY