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/src/lib/tw-polyfill.js

@@ -0,0 +1,54 @@
+/* eslint-disable no-extend-native */
+
+if (!Blob.prototype.text) {
+    Blob.prototype.text = function () {
+        return new Promise((resolve, reject) => {
+            const fr = new FileReader();
+            fr.onload = () => resolve(fr.result);
+            fr.onerror = () => reject(new Error('Cannot read blob as text'));
+            fr.readAsText(this);
+        });
+    };
+}
+
+if (!Array.prototype.flat) {
+    Array.prototype.flat = function (depth = 1) {
+        const result = [];
+        for (const i of this) {
+            if (Array.isArray(i)) {
+                if (depth < 1) {
+                    result.push(i);
+                } else {
+                    for (const j of i.flat(depth - 1)) {
+                        result.push(j);
+                    }
+                }
+            } else {
+                result.push(i);
+            }
+        }
+        return result;
+    };
+}
+
+if (!Array.prototype.flatMap) {
+    Array.prototype.flatMap = function (...args) {
+        return this.map(...args).flat();
+    };
+}
+
+if (typeof queueMicrotask !== 'function') {
+    window.queueMicrotask = callback => {
+        Promise.resolve().then(callback);
+    };
+}
+
+if (!Object.fromEntries) {
+    Object.fromEntries = function (entries) {
+        const object = {};
+        for (const entry of entries) {
+            object[entry[0]] = entry[1];
+        }
+        return object;
+    };
+}