feat: add button from no workspace open in new project flow (#475)

improves the problem faced here:
#470 but I
think ultimately we should determine a more comprehensive flow

Author: eleanorjboyd

src/features/envCommands.ts

@@ -1,4 +1,4 @@
-import { QuickInputButtons, TaskExecution, TaskRevealKind, Terminal, Uri, workspace } from 'vscode';
+import { commands, QuickInputButtons, TaskExecution, TaskRevealKind, Terminal, Uri, workspace } from 'vscode';
 import {
     CreateEnvironmentOptions,
     PythonEnvironment,
@@ -397,8 +397,17 @@ export async function addPythonProjectCommand(
     pc: ProjectCreators,
 ): Promise<void> {
     if (wm.getProjects().length === 0) {
-        showErrorMessage('Please open a folder/project before adding a workspace');
-        return;
+        const r = await showErrorMessage(
+            'Please open a folder/project to create a Python project.',
+            {
+                modal: true,
+            },
+            'Open Folder',
+        );
+        if (r === 'Open Folder') {
+            await commands.executeCommand('vscode.openFolder');
+            return;
+        }
     }
     if (resource instanceof Array) {
         for (const r of resource) {