feat(auth): add authentication routes and user token handling

- Implemented user authentication routes in `auth.ts` for fetching current user info and admin verification.
- Added caching mechanism for user tokens to improve performance.
- Created middleware for admin authentication.

feat(opencode): create OpenCode client route

- Added `opencode-cnb` route for creating OpenCode clients with session management.
- Integrated OpenCode SDK for client operations and session handling.

refactor(client): encapsulate OpenCode client creation

- Created a utility function `getClient` in `client.ts` to initialize OpenCode clients.

test(opencode): add tests for OpenCode routes

- Implemented test cases for OpenCode routes in `list.ts` to validate functionality.
- Created common utilities for testing in `common.ts`.

assistant/src/routes/opencode/test/list.ts

@@ -0,0 +1,14 @@
+import { app, showMore } from './common.ts';
+
+const main = async () => {
+  const res = await app.run({
+    path: 'opencode-cnb',
+    key: 'question',
+    payload: {
+      question: '当前的projects目录下有哪些文件？',
+    }
+  }, { appId: app.appId });
+  console.log('res', showMore(res));
+}
+
+main();