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_costume_import_export.js

@@ -0,0 +1,76 @@
+const {
+    parseVectorMetadata,
+    exportCostume
+} = require('../../src/serialization/tw-costume-import-export');
+const {test} = require('tap');
+
+test('parseVectorMetadata', t => {
+    /* eslint-disable max-len */
+    t.same(
+        parseVectorMetadata('<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"></svg><!--rotationCenter:0:0-->'),
+        [0, 0]
+    );
+    t.same(
+        parseVectorMetadata('<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"></svg><!--rotationCenter:-0.0:-0.0-->'),
+        [0, 0]
+    );
+    t.same(
+        parseVectorMetadata('<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"></svg><!--rotationCenter:-1:3-->'),
+        [-1, 3]
+    );
+    t.same(
+        parseVectorMetadata('<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"></svg><!--rotationCenter:106.62300344745225:-11.822572945859918-->'),
+        [106.62300344745225, -11.822572945859918]
+    );
+    t.same(
+        parseVectorMetadata('<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"></svg><!--rotationCenter:a:b-->'),
+        null
+    );
+    t.same(
+        parseVectorMetadata('<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"></svg><!--rotationCenter:-1:-->'),
+        null
+    );
+    t.same(
+        parseVectorMetadata('<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"></svg>'),
+        null
+    );
+    /* eslint-enable max-len */
+
+    t.end();
+});
+
+test('exportCostume', t => {
+    // PNG and JPG costumes are exported as-is
+    t.same(exportCostume({
+        dataFormat: 'png',
+        asset: {
+            data: new Uint8Array([10, 20, 30])
+        }
+    }), new Uint8Array([10, 20, 30]));
+    t.same(exportCostume({
+        dataFormat: 'jpg',
+        asset: {
+            data: new Uint8Array([40, 50, 60])
+        }
+    }), new Uint8Array([40, 50, 60]));
+
+    t.same(exportCostume({
+        dataFormat: 'svg',
+        asset: {
+            data: new TextEncoder().encode('<svg></svg>')
+        },
+        rotationCenterX: 89.339393,
+        rotationCenterY: -3.7373
+    }), new TextEncoder().encode('<svg></svg><!--rotationCenter:89.339393:-3.7373-->'));
+
+    t.same(exportCostume({
+        dataFormat: 'svg',
+        asset: {
+            data: new TextEncoder().encode('<svg></svg><!--rotationCenter:78.23:-9-->')
+        },
+        rotationCenterX: 89.339393,
+        rotationCenterY: -3.7373
+    }), new TextEncoder().encode('<svg></svg><!--rotationCenter:89.339393:-3.7373-->'));
+
+    t.end();
+});