add librevna windows application icon

[bryanparadis]

Summary:

Just got my LibreVNA the other day. Went to pin it to my task bar, had no icon and when checking it's properties the exe doesn't contain an icon. #65 added an icon for in the application and for linux distributions through a .desktop file. This PR adds an icon to the windows executable.

Icon File generation:

sudo apt install imagemagick
convert librevna.png -define icon:auto-resize=16,48,256 -compress zip librevna.ico

Before:

After:

[jankae]

Thanks, I never noticed that before (but also never pinned the GUI to the task bar). When I run the GUI, it shows up with an icon but as soon as I pin it to the task bar that icon disappears.
I'll let the automatic checks run to verify everything on my end and will merge it afterwards.

[bryanparadis]

Thanks, I never noticed that before (but also never pinned the GUI to the task bar). When I run the GUI, it shows up with an icon but as soon as I pin it to the task bar that icon disappears. I'll let the automatic checks run to verify everything on my end and will merge it afterwards.

Yes. It's interesting behavior. I guess windows grabs it from the running app when that app isn't pinned.

[jankae]

Works exactly as intended on my machine as well, thanks again