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_stop_this_script.js

@@ -0,0 +1,52 @@
+const {test} = require('tap');
+const Thread = require('../../src/engine/thread');
+const Runtime = require('../../src/engine/runtime');
+const Target = require('../../src/engine/target');
+
+test('stopThisScript procedures_call reporter form', t => {
+    const rt = new Runtime();
+    const target = new Target(rt, null);
+
+    target.blocks.createBlock({
+        id: 'reporterCall',
+        opcode: 'procedures_call',
+        inputs: {},
+        fields: {},
+        mutation: {
+            return: '1'
+        },
+        shadow: false,
+        topLevel: true,
+        parent: null,
+        next: 'afterReporterCall'
+    });
+    target.blocks.createBlock({
+        id: 'afterReporterCall',
+        opcode: 'motion_ifonedgebounce',
+        inputs: {},
+        fields: {},
+        mutation: null,
+        shadow: false,
+        topLevel: false,
+        parent: null,
+        next: null
+    });
+
+    const thread = new Thread('reporterCall');
+    thread.target = target;
+
+    // pretend to run reporterCall
+    thread.pushStack('reporterCall');
+    thread.peekStackFrame().waitingReporter = true;
+
+    // pretend to run scripts inside of the procedure
+    thread.pushStack('fakeBlock');
+
+    // stopping or returning should always return to reporterCall, not the block after
+    thread.stopThisScript();
+    t.same(thread.stack, [
+        'reporterCall'
+    ]);
+
+    t.end();
+});