Added GitHub CI and automatic release to NuGet

[lostmsu]

@lontivero will need to add a GitHub secret named NUGET_API_KEY with their API key for NuGet. After that pushing any new tag will attempt to create and upload a NuGet release.

E.g.

git tag 3.0.0-alpha
git push --tags

Will trigger a GitHub workflow that will upload 3.0.0-alpha release to NuGet after building and testing.

[lontivero]

I really appreciate your effort here but I won't continue maintaining this repo and I have lose access to my Microsoft account after being targeted for people trying to break into my accounts heavily.