Support binding keyboard controls

[Babellr]

I never reported any problems on github, but a guy from the ship of harkinian community told me that I could ask you here if there would be keyboard support in this project at some point since right now, as the title says, when I go the controls section does not let me select any since I do not have any connected

[robmikh]

Currently the tool only supports controller binding. If I get some free time, I can see if I can add keyboard support.