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/integration/tw_step_events.js

@@ -0,0 +1,24 @@
+const Runtime = require('../../src/engine/runtime');
+const {test} = require('tap');
+
+test('step events', t => {
+    const events = [];
+    const rt = new Runtime();
+    rt.sequencer.stepThreads = () => {
+        events.push('sequencer.stepThreads()');
+        return [];
+    };
+    rt.on('BEFORE_EXECUTE', () => {
+        events.push('BEFORE_EXECUTE');
+    });
+    rt.on('AFTER_EXECUTE', () => {
+        events.push('AFTER_EXECUTE');
+    });
+    rt._step();
+    t.same(events, [
+        'BEFORE_EXECUTE',
+        'sequencer.stepThreads()',
+        'AFTER_EXECUTE'
+    ]);
+    t.end();
+});