When `CSharpier.MSBuild` is installed, use that in VS/Rider extensions instead of the CLI tool

[belav]

Discussed in https://github.com/belav/csharpier/discussions/942

^{Originally posted by Tyrrrz August 23, 2023} I'm not entirely sure if it doesn't work like this already, but judging by the fact that Rider told me I still need to install CSharpier CLI, I assume not.

The idea is that, if the current project already has CSharpier.MSBuild installed, the IDE extension should be able to just invoke dotnet build /t:SOME_CSHARPIER_TARGET to perform formatting using the same tooling as the project already uses during build.