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/common.ts

@@ -0,0 +1,9 @@
+import { app } from '@/app.ts';
+import '../cnb.ts'
+import "@/routes/auth.ts"
+import util from "node:util"
+export { app }
+
+export const showMore = (data: any) => {
+  return util.inspect(data, { depth: null, colors: true })
+}