Management: add version information

[Gauss23]

Is your feature request related to a problem? Please describe.
it would be helpful to see the current version of the management server in self-hosted scenarios

Describe the solution you'd like
Show a version number in the footer.

Describe alternatives you've considered
No idea

Additional context

[rihards-simanovics]

To find the version fo your current Netbird Management instance, all you need to do is run docker ps get the name for the container likely netbird-management-1 then exec this command int he container docker exec -it netbird-management-1 /go/bin/netbird-mgmt --version. Response should be something like netbird-mgmt version 0.35.1

[Gauss23]

Thank you. I was aware of how to get the information via the command line. I wanted to see this information in the management dashboard i.e. as a line in the footer to see this without connecting via SSH to the server.

Happy New Year.