Initial commit of 001code-html Scratch frontend project.

Includes scratch-gui, scratch-vm, scratch-blocks, scratch-render, scratch-l10n, and deployment config.

Co-authored-by: Cursor <cursoragent@cursor.com>

scratch-vm/test/unit/tw_clones.js

@@ -0,0 +1,18 @@
+const Runtime = require('../../src/engine/runtime');
+const Sprite = require('../../src/sprites/sprite');
+
+const {test} = require('tap');
+
+test('clone counter', t => {
+    const rt = new Runtime();
+    const sprite = new Sprite(null, rt);
+    const original = sprite.createClone();
+    t.equal(rt._cloneCounter, 0);
+    const clone = original.makeClone();
+    t.equal(rt._cloneCounter, 1);
+    clone.dispose();
+    t.equal(rt._cloneCounter, 0);
+    original.dispose();
+    t.equal(rt._cloneCounter, 0);
+    t.end();
+});