feat: 更新依赖和增强动态表单功能

- 在 package.json 中添加 hammerjs 和 tui-image-editor 依赖
- 在 DynamicForm.vue 中引入并实现装饰性图片功能，支持图片上传、删除和属性调整
- 优化颜色处理逻辑，支持 RGBA 格式
- 更新常量和类型定义，增强代码可读性和可维护性

package.json

@@ -52,6 +52,7 @@
     "fast-xml-parser": "^5.2.1",
     "file-saver": "^2.0.5",
     "grapheme-splitter": "^1.0.4",
+    "hammerjs": "^2.0.8",
     "html2canvas": "^1.4.1",
     "idb-keyval": "^6.2.1",
     "linqts": "^2.0.0",
@@ -66,6 +67,7 @@
     "prettier": "^3.5.3",
     "qrcode.vue": "^3.6.0",
     "queue-typescript": "^1.0.1",
+    "tui-image-editor": "^3.15.3",
     "unplugin-auto-import": "^19.1.2",
     "unplugin-vue-components": "^28.5.0",
     "unplugin-vue-markdown": "^28.3.1",