Added 2 tools and cleaned up the look.

[ajmcateer]

I cleaned up the look a bit by adding categories I kept it alphabetical in each category. If you don't like it I can revert to the old look.

• [x] Your submissions have the following format:

  - [ajmcateer/GotifyDesktop](https://github.com/ajmcateer/GotifyDesktop) A cross platform Desktop client `gotify/server`.
  - [ajmcateer/GotifySharp](https://github.com/ajmcateer/GotifySharp) A C# library for interacting with `gotify/server`.

• [x] Your additions are ordered alphabetically.
• [x] The projects you add are actively maintained.

[jmattheis]

Thanks, I've made some changes and manually pushed it.