feat: integrate Convex API and add N5 proxy functionality

- Added Convex client setup in a new module for handling Convex API interactions.
- Implemented N5Proxy to handle requests for the /n5/:slug route, querying Convex for application links.
- Updated app context to include Convex client and API.
- Adjusted routing to support new Convex API endpoints.
- Enhanced error handling for missing applications in the N5 proxy.

src/routes-simple/index.ts

@@ -6,7 +6,7 @@ import './routes/jwks.ts'
 
 const simpleAppsPrefixs = [
   "/api/wxmsg",
-  "/api/convex/"
+  "/api/convex/",
 ];