Show version in footer of main ZMK window

[peterjc]

Is your feature request related to a problem? Please describe.

ZMK Studio bug reports are likely to come with screenshots. You will also want to know the version - so add this to the footer alongside the copyright info (which incidentally still says 2024), eg:

Describe the solution you'd like

Insert some text like " - version 0.3.1 - " into the copyright line.

Describe alternatives you've considered

You can click on the "About ZMK Studio" in the main menu on macOS.

Additional context