fix(Windows): Check for bash and enable if present

[nokome]

Bash is available on Windows:

• https://docs.microsoft.com/en-us/windows/wsl/install-win10
• https://itsfoss.com/install-bash-on-windows/

Basha should check for it's availability and enable the correct command if it is present (and/or inform the user how to set it up).

Windows support is not a high priority but would obviously help Windows users and developers who want to use basha locally.