Add a placeholder titlebar / taskbar icon

[tmpvar]

Sometimes I use the taskbar to click on icons and with an icon-less application running it makes it ~50/50 whether the right app is focused.

The placeholder icon is programmer art of a D with a "next track" icon inside - just to make it more clear than a "play" icon that just looks like the inside of the D. I thought about doing something with the Rad logo, but in the end decided to do something simple and let someone with more talent update the icon.

As for updating the icon, simply run (requires [png2ico])

data\icon\build.bat

and then rebuild raddbg.exe

build.bat raddbg

Tested with VS and clang builds.

The aseprite file: raddebugger.aseprite.zip