add github support

[Tricked-dev]

this pr adds Github releases installing support and updating

example

packwiz gh add caffeinemc/sodium-fabric packwiz gh add https://github.com/caffeinemc/sodium-fabric

Setting branch

You can also set a custom branch to be used

[update]
[update.github]
branch = "1.16.x/dev"
mod-id = "caffeinemc/sodium-fabric"
version = "mc1.19-0.4.2"

[Tricked-dev]

closes #30

[Tricked-dev]

@comp500 should be ready for merge lmk if there's anything wrong

[youmukonpaku1337]

hmmm interesting

[iinterp]

It would be great to have it check for your minecraft version in the name of the file, since a lot of mods package all of their versions into one github release.

Ideally it would check your game version and your allowed versions, an option for a custom search would be good too, for things like "1.16+" in the file name.

Ferium does this decently well.

[Tricked-dev]

@comp500 just merge this pr into a separate branch and add your changes, don't really want to bother with go atm

[comp500]

Superseded by #230