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/addons/addon-precedence.js

@@ -0,0 +1,18 @@
+// This list is a subset of all addon IDs to control the order of userstyles.
+// The last item in the list is given the highest precedence (last in the DOM).
+// If an addon isn't listed here, it's interpreted to have lowest precedence and
+// that its order with other unlisted addons does not matter.
+const addonPrecedence = [
+    'columns',
+    'editor-stage-left',
+    'editor-theme3',
+    'hide-stage'
+];
+
+/**
+ * @param {string} addonId The addon ID
+ * @returns {number} An integer >= 0
+ */
+const getPrecedence = addonId => addonPrecedence.indexOf(addonId) + 1;
+
+export default getPrecedence;