feat: implement OpenClaw process owner and runtime path utilities

- Add OpenClawProcessOwner class to manage the lifecycle of the OpenClaw process.
- Introduce utility functions for managing OpenClaw runtime paths.
- Update session store to normalize agent session keys and migrate existing keys.
- Refactor main process to handle local provider API routing through a new dispatch function.
- Enhance token usage writer to utilize a new session key parsing function.
- Create agents management store to handle agent data and interactions.
- Update chat store to integrate agent selection and session management.
- Introduce AgentsSection component for displaying agent information in the UI.
- Refactor HomePage to support agent selection and display current agent.
- Update routing to reflect new agents page structure.

src/router/index.tsx

@@ -3,7 +3,7 @@ import { Navigate, Route, Routes, useLocation, useNavigate } from 'react-router-
 import MainLayout from '../components/layout/MainLayout';
 import HomePage from '../pages/Home';
 import LoginPage from '../pages/Login';
-import AgentsPage from '../pages/Agents';
+import AgentsPage from '../pages/agents';
 import SkillsPage from '../pages/Skills';
 import CronPage from '../pages/Cron';
 import ScriptsPage from '../pages/Scripts';