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-gui/test/__mocks__/audio-effects.js

@@ -0,0 +1,24 @@
+export default class MockAudioEffects {
+    static get effectTypes () { // @todo can this be imported from the real file?
+        return {
+            ROBOT: 'robot',
+            REVERSE: 'reverse',
+            LOUDER: 'higher',
+            SOFTER: 'lower',
+            FASTER: 'faster',
+            SLOWER: 'slower',
+            ECHO: 'echo'
+        };
+    }
+    constructor (buffer, name) {
+        this.buffer = buffer;
+        this.name = name;
+        this.process = jest.fn(done => {
+            this._finishProcessing = renderedBuffer => {
+                done(renderedBuffer, 0, 1);
+                return new Promise(resolve => setTimeout(resolve));
+            };
+        });
+        MockAudioEffects.instance = this;
+    }
+}