add ChirpstackOS and model/target/soc version to gui

[g6094199]

hi

i cant find the current running release in the gui? without opening the logs and status/overview. right?

best it would be displayed on the bottom beside the gw id for simple access

thx

[brocaar]

All version info can be found in the overview:

I'm happy to review a pull-request to add the version-number to the footer.