build: should generate Hi-res sourcemap for dev (#12501)

Author: fi3ework

packages/vite/rollup.config.ts

@@ -300,7 +300,7 @@ const __require = require;
 
       return {
         code: s.toString(),
-        map: s.generateMap(),
+        map: s.generateMap({ hires: true }),
       }
     },
   }