Refactor asset handling and authentication logic (for node)

Updated asset path configuration and server-side logic to standardize asset serving. Introduced `shouldSkipAuth` to bypass authentication for asset requests. Added test coverage for the new asset path handling logic.

app/src/modules/Module.ts

@@ -10,7 +10,9 @@ import type { Hono } from "hono";
 export type ServerEnv = {
    Variables: {
       app: App;
+      // to prevent resolving auth multiple times
       auth_resolved: boolean;
+      // to only register once
       auth_registered: boolean;
       html?: string;
    };