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_allow_drop_anywhere.js

@@ -0,0 +1,33 @@
+const {test} = require('tap');
+const Runtime = require('../../src/engine/runtime');
+const BlockType = require('../../src/extension-support/block-type');
+
+test('allowDropAnywhere', t => {
+    t.plan(2);
+
+    const rt = new Runtime();
+
+    rt.on('EXTENSION_ADDED', json => {
+        t.equal(json.blocks[0].json.output, 'String');
+        t.equal(json.blocks[1].json.output, null);
+        t.end();
+    });
+
+    rt._registerExtensionPrimitives({
+        id: 'testextension',
+        name: 'test',
+        blocks: [
+            {
+                opcode: 'drop1',
+                text: 'drop not anywhere',
+                blockType: BlockType.REPORTER
+            },
+            {
+                opcode: 'drop2',
+                text: 'drop anywhere',
+                blockType: BlockType.REPORTER,
+                allowDropAnywhere: true
+            }
+        ]
+    });
+});