Update on my Loading Indicator Fork

[Der-Floh]

Hi, wanted to share that I took a look at more Loading Indicators and added several of common ones to my Fork also fixed some of the old animations. I also changed some things in regards of what the user needs to do in order to user the control which is now only adding the styles in their app.axaml

you can take a look at everything here:
https://github.com/Der-Floh/LoadingIndicators.Avalonia

Since much changed in general, I'm probably not gonna make a PR since i don't know what you need / want to keep and all that (for example also changed the nuget upload and github pages workflow).

So feel free to merge my things in your Project as you like (I'm also probably keep adding / updating this if I need and have time)