dotnet stryker baseline commands

[rouke-broersma]

Is your feature request related to a problem? Please describe.
Baseline and since (git diff) are currently commandline options. It might be nice to make these options specific commands (so specific flavors of stryker runs).

Describe the solution you'd like

Run stryker in baseline mode:
dotnet stryker baseline --target "develop" --mutation-level "Basic"
Run stryker in baseline mode and refresh baseline:
dotnet stryker baseline recreate --target "feat/1234-abcd" --mutation-level "Basic"

These commands would no longer be config file options (as they are no longer options).

Additional context
Relevant after #578