fix: Folder not exist when select the workspace folder (LeetCode-OpenSource#713)

Author: jdneo

src/utils/workspaceUtils.ts

@@ -1,6 +1,7 @@
 // Copyright (c) jdneo. All rights reserved.
 // Licensed under the MIT license.
 
+import * as fse from "fs-extra";
 import * as os from "os";
 import * as path from "path";
 import * as vscode from "vscode";
@@ -19,6 +20,7 @@ export async function selectWorkspaceFolder(): Promise<string> {
         }
     }
     let needAsk: boolean = true;
+    await fse.ensureDir(workspaceFolderSetting);
     for (const folder of vscode.workspace.workspaceFolders || []) {
         if (isSubFolder(folder.uri.fsPath, workspaceFolderSetting)) {
             needAsk = false;
@@ -36,6 +38,7 @@ export async function selectWorkspaceFolder(): Promise<string> {
             { placeHolder: "The LeetCode workspace folder is not opened in VS Code, would you like to open it?" },
         );
 
+        // Todo: generate file first
         switch (choice) {
             case OpenOption.justOpenFile:
                 return workspaceFolderSetting;