Add Geany to IDEs

[Phate6660]

Geany is an amazing IDE that is cross-platform, fast, feature-rich, and surprisingly very small (12mb for me last time I checked).

I was quite shocked when I looked through this repo and found that not a single thing mentioned it, so I decided to make this pull request.

[1234567-glitch]

@Roman2K should I be able to hel