feat(api): 添加新的foo接口并支持alova风格API调用

添加新的foo接口实现，同时扩展http模块以支持alova风格的API调用方式（Get/Post/Put/Delete）。移除旧的alova-foo.ts文件并统一使用新的实现。

src/http/http.ts

@@ -110,3 +110,9 @@ http.get = httpGet
 http.post = httpPost
 http.put = httpPut
 http.delete = httpDelete
+
+// 支持与 alovaJS 类似的API调用
+http.Get = httpGet
+http.Post = httpPost
+http.Put = httpPut
+http.Delete = httpDelete