ci(dotnet): publish nuget packages for all supported environments

[mhmd-azeez]

NuGet supports the distribution of native binaries. We already provide a win-x64 package, this PR adds packages for the other environments. We will be publishing these NuGet packages:

• Extism.runtime.linux-arm64
• Extism.runtime.linux-musl-arm64
• Extism.runtime.linux-x64
• Extism.runtime.osx-arm64
• Extism.runtime.osx-x64
• Extism.runtime.win-x64 (msvc)
• Extism.runtime.all -> this is a meta package that referencs all other packages. The idea is, in the getting started guides we instruct the user to take a dependency on Extism.Sdk and Extism.runtime.all. This will make sure their apps work on all supported operating systems automatically. Otherwise, they can just take a dependency on what they care about

This PR also adds a dependency on MinVer which make sure packages are automatically versioned based on git tags.

Related to #486

[mhmd-azeez]

@chrisdickinson I didn't put it in release.yml yet because I wanted to publish it once to see if it works well before messing with all the other releases. But can create a new PR that adds this as a step there afterwards

[chrisdickinson]

Great work! Landing this and following up by splitting the dotnet pack creation from the dotnet nuget push steps is perfect.