[新增ICNS图标自动生成工作流及资源文件]

- 新增GitHub Actions工作流：创建macOS环境的ICNS自动生成流水线，当icns目录内容发生变更时触发
- 添加图标源文件：引入crash-report.png和qt-app.png两个PNG格式的原始图标资源
- 配置Python环境：工作流中设置Python 3.13虚拟环境并安装项目依赖
- 实现自动化处理：通过make_icns.py脚本批量处理icns目录下的所有PNG图像文件
- 添加产物输出：将生成的ICNS文件打包为可下载的工作流artifact
- 优化执行效率：配置浅层检出（fetch-depth: 1）以加速仓库克隆过程

Author: RealChuan

.github/workflows/make-icns.yml

@@ -0,0 +1,47 @@
+name: Make ICNS
+
+on: 
+  push:
+    paths:
+        - 'icns/**'
+  pull_request:
+    paths:
+        - 'icns/**'
+
+jobs:
+  build:
+    name: Make ICNS
+    runs-on: macos-latest
+
+    steps:
+      - uses: actions/checkout@v5
+        with: 
+          fetch-depth: 1
+          
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.13'
+
+      - name: Create and activate virtual environment, install dependencies, and generate icons
+        shell: bash
+        run: |
+          source activate_venv.sh
+
+          python3 -m pip install --upgrade pip
+          pip install -e .
+
+          for img in icns/*; do
+            python3 image-toolkit/make_icns.py "$img"
+          done
+
+          deactivate
+
+          ls -lh icns/*.icns
+
+      - name: Upload ICNS files
+        uses: actions/upload-artifact@v4
+        with:
+          name: icns-files
+          path: icns/*.icns
+