refactor(all): only use single html, replace p5js control panel with plain html

Co-authored-by: Copilot <copilot@github.com>

vite.config.js

@@ -6,9 +6,7 @@ module.exports = defineConfig({
   build: {
     rollupOptions: {
       input: {
-        main: resolve(__dirname, 'index.html'),
-        single: resolve(__dirname, 'single_sketch.html'),
-        multi: resolve(__dirname, 'multi_sketch.html')
+        main: resolve(__dirname, 'index.html')
       }
     }
   }