feat: set default CSV save location to workspace root for remote workspace (#1550)

* chore: Set default CSV save location to workspace root for remote.

* chore: Handle remote workspace environments in table download path

* DCO Remediation Commit for Shuguang Sun <shuguang79@qq.com>

I, Shuguang Sun <shuguang79@qq.com>, hereby add my Signed-off-by to this commit: 75a1541
I, Shuguang Sun <shuguang79@qq.com>, hereby add my Signed-off-by to this commit: 9dd75f2

and alsoe remove unused comments

Signed-off-by: Shuguang Sun <shuguang79@qq.com>

---------

Signed-off-by: Shuguang Sun <shuguang79@qq.com>

Author: ShuguangSun

client/src/components/LibraryNavigator/index.ts

@@ -6,11 +6,13 @@ import {
   ExtensionContext,
   Uri,
   commands,
+  env,
   window,
   workspace,
 } from "vscode";
 
 import { createWriteStream } from "fs";
+import * as path from "path";
 
 import { profileConfig } from "../../commands/profile";
 import { Column } from "../../connection/rest/api/compute";
@@ -69,10 +71,23 @@ class LibraryNavigator implements SubscriptionProvider {
       commands.registerCommand(
         "SAS.downloadTable",
         async (item: LibraryItem) => {
+          let dataFilePath: string = "";
+          if (
+            env.remoteName !== undefined &&
+            workspace.workspaceFolders &&
+            workspace.workspaceFolders.length > 0
+          ) {
+            // start from 'rootPath' workspace folder
+            dataFilePath = workspace.workspaceFolders[0].uri.fsPath;
+          }
+          dataFilePath = path.join(
+            dataFilePath,
+            `${item.library}.${item.name}.csv`.toLocaleLowerCase(),
+          );
+
+          // display save file dialog
           const uri = await window.showSaveDialog({
-            defaultUri: Uri.file(
-              `${item.library}.${item.name}.csv`.toLocaleLowerCase(),
-            ),
+            defaultUri: Uri.file(dataFilePath),
           });
 
           if (!uri) {