Add wiki page on VARA

[martinhpedersen]

Now that we finally have support for VARA, it would be great to have a page explaining how to get started. We should probably also explain all the caveats (windows+x86 binaries only).

Some sources of inspiration:

• https://github.com/la5nta/pat/wiki/ARDOP
• https://github.com/la5nta/pat/wiki/WINMOR-TNC
• https://github.com/harenber/ptc-go/wiki#setup

[xylo04]

First pass: VARA

[martinhpedersen]

Thank you! That's more than I was hoping for in the first version 😄

Should we close this issue then, and let the wiki page evolve like they often do?