Missing command to activate virtual environment in Windows

[faynef]

Describe the issue: Run source venv/bin/activate displays that the file or directory does not exist on windows:

Suggestions: Add a command to activate the virtual environment on Windows.

Environment:

• azd version: 1.9.5 (commit cd2b7af9995d358aab33c782614f801ac1997dde)
• OS: Windows11

Expected Behavior: Successfully activated the virtual environment on windows.

@marlenezw and @hemarina for notification.

[marlenezw]

Thanks this issue was addressed in the PR mentioned above

[faynef]

@marlenezw The changes in your PR18 regarding activating a virtual environment were added to the wrong place. They should have been added to the local environment, not the codespace.