规范插件代码结构

src/type-definition/extended-quick-pick-item-type.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;