Choose project for terminal (#1401)

Fixes #291 

<img width="1224" height="286" alt="image"
src="https://github.com/user-attachments/assets/05bf5783-8f0f-4479-9b0e-e838ccc85aa2"
/>


This pull request updates the logic for creating terminal commands
related to Python environments, focusing on how Python projects are
retrieved and passed to the `pickProject` function. The changes improve
consistency and clarity in how project lists are handled.

**Improvements to project selection logic:**

* The list of Python projects is now retrieved once and reused in both
the undefined context and tree item context branches, ensuring
consistency and avoiding redundant API calls.
[[1]](diffhunk://#diff-aed4c8c8194da21783959fe3536c5b86f48d4c0755e2ef4092501dbc5e849419L609-R611)
[[2]](diffhunk://#diff-aed4c8c8194da21783959fe3536c5b86f48d4c0755e2ef4092501dbc5e849419L644-R645)
* The condition for prompting the user to pick a project has been
updated to check if the list of Python projects is non-empty, which
prevents unnecessary prompts when there are no projects available.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: edvilme

src/features/envCommands.ts

@@ -30,7 +30,6 @@ import { removePythonProjectSetting, setEnvironmentManager, setPackageManager }
 
 import { executeCommand } from '../common/command.api';
 import { clipboardWriteText } from '../common/env.apis';
-import {} from '../common/errors/utils';
 import { Pickers } from '../common/localize';
 import { pickEnvironment } from '../common/pickers/environments';
 import {
@@ -606,8 +605,10 @@ export async function createTerminalCommand(
     api: PythonEnvironmentApi,
     tm: TerminalManager,
 ): Promise<Terminal | undefined> {
-    if (context === undefined) {
-        const pw = await pickProject(api.getPythonProjects());
+    const pythonProjects = api.getPythonProjects();
+    // If no context is provided, or there are multiple projects, prompt the user to select a project for the terminal's cwd
+    if (context === undefined || pythonProjects.length > 0) {
+        const pw = await pickProject(pythonProjects);
         if (pw) {
             const env = await api.getEnvironment(pw.uri);
             const cwd = await findParentIfFile(pw.uri.fsPath);
@@ -641,7 +642,7 @@ export async function createTerminalCommand(
         }
     } else if (context instanceof PythonEnvTreeItem) {
         const view = context as PythonEnvTreeItem;
-        const pw = await pickProject(api.getPythonProjects());
+        const pw = await pickProject(pythonProjects);
         if (pw) {
             const cwd = await findParentIfFile(pw.uri.fsPath);
             const terminal = await tm.create(view.environment, { cwd });