统一转换方式名称&显示排序；统一转换函数；项目目录结构微调；补全测试用例并全部测试通过

src/type-definition/QuickPickItemExType.ts

@@ -0,0 +1,9 @@
+import * as vscode from 'vscode';
+
+interface ExtendedQuickPickItem extends vscode.QuickPickItem {
+    value: string;
+}
+
+type QuickPickItemEx = ExtendedQuickPickItem | vscode.QuickPickItem;
+
+export default QuickPickItemEx;