feat(macos): add Canvas A2UI renderer

vendor/a2ui/renderers/lit/src/0.8/styles/index.ts

@@ -0,0 +1,37 @@
+/*
+ Copyright 2025 Google LLC
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+      https://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import { behavior } from "./behavior.js";
+import { border } from "./border.js";
+import { colors } from "./colors.js";
+import { icons } from "./icons.js";
+import { layout } from "./layout.js";
+import { opacity } from "./opacity.js";
+import { type } from "./type.js";
+
+export * from "./utils.js";
+
+export const structuralStyles: string = [
+  behavior,
+  border,
+  colors,
+  icons,
+  layout,
+  opacity,
+  type,
+]
+  .flat(Infinity)
+  .join("\n");