update doc: add signature help demo

Author: huanguolin

packages/ng-helper-vscode/README.md

@@ -13,7 +13,7 @@
 - [x] Custom components: tag/attribute auto-completion, hover documentation, go to definition ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/components-demo.gif))
 - [x] Custom filters: auto-completion, hover documentation, go to definition ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/filters-demo.gif))
 - [x] HTML syntax highlighting with inline HTML support ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/inline-html-demo.gif))
-- [x] Data binding (TypeScript required): auto-completion, type hints on hover, go to definition ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/data-binding-demo.gif))
+- [x] Data binding (TypeScript required): auto-completion, type hints on hover, go to definition, ✨🆕 signature help ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/data-binding-demo.gif))
 - [x] Diagnostics
   - [x] ✨🆕 Angular.js expression diagnostics in HTML([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/diagnostic-demo.gif))
   - [x] Dependency injection validation ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/injection-validate-demo.gif))

packages/ng-helper-vscode/README.zh_cn.md

@@ -11,7 +11,7 @@
 - [x] 自定义 `component` 标签/属性: 自动补全, hover 信息提示, go to definition ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/components-demo.gif))
 - [x] 自定义 `filter`: 自动补全, hover 信息提示, go to definition ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/filters-demo.gif))
 - [x] `html` 语法高亮，且支持 `inline-html`([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/inline-html-demo.gif))
-- [x] 数据绑定（需要 `TypeScript`）: 自动补全, hover 类型提示, go to definition ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/data-binding-demo.gif))
+- [x] 数据绑定（需要 `TypeScript`）: 自动补全, hover 类型提示, go to definition, ✨🆕 signature help ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/data-binding-demo.gif))
 - [x] 诊断
   - [x] ✨🆕 `html` 中 angular.js 表达式诊断([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/diagnostic-demo.gif))
   - [x] 依赖注入匹配校验 ([see demo](https://raw.githubusercontent.com/huanguolin/ng-helper/refs/heads/main/resources/injection-validate-demo.gif))