feat(core): Integrate Rolldown as optional bundler, migrate filesystem to smartfs, and update bundler/tooling

test/ts_web/test-lit.ts

@@ -19,9 +19,7 @@ export class MyElement extends LitElement {
   render() {
     return html`
       <h1>Hello, ${this.name}!</h1>
-      <button @click=${this._onClick}>
-        Click Count: ${this.count}
-      </button>
+      <button @click=${this._onClick}>Click Count: ${this.count}</button>
     `;
   }
 
@@ -34,4 +32,4 @@ export class MyElement extends LitElement {
 const element = new MyElement();
 console.log('Element created:', element);
 console.log('Element name:', element.name);
-console.log('Element count:', element.count);
+console.log('Element count:', element.count);