net8 support

[Marvin-Brouwer]

Is your feature request related to a problem? Please describe.
DotNet v8 is scheduled to be released in November 2023.
Even though net8 solutions can use older versions it makes sense to publish specific versions.
This should make sure we get the full net8 performance improvements and it'll ensure future proofing.

Describe the solution you'd like
Add the version to the build pipelines and csproj output on top of netstandard2.0, netstandard2.1, net6 and net7.

Describe alternatives you've considered
-

Additional context
It's not necessary to profile net6 after this feature since it'll go out of support soon after the net8 release.
See: https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core#cadence for the release cycle

[Marvin-Brouwer]

• See if there's a place to try this: https://www.youtube.com/watch?v=xIA3t2Je3uQ