Use `Fsc` msbuild task instead of `dotnet-compile-fsc`

[enricosada]

The msbuild target invoke the dotnet-compile-fsc sdk tool.
Should use an Fsc msbuild task instead (see microsoft/visualfsharp task for example)

[enricosada]

integration should be like now, so target file are good or similar.
But instead of call dotnet-compile-fsc in the target file , we use Fsc task.

Fsc task source code i think can be duplicated (for now) from microsoft/visualfsharp repo.
Later it should use the fsc task from visualsharp as deps, on just one package (doenst matter from what repo) with embedded assembly/target

The f# target files pratically set properties of Fsc task in CoreCompile target.

the Fsc task should contains the same little workaround of dotnet-compile-fsc (.exe extension, --targetprofile, etc), if needed.
Maybe .exe is not required anymore with newer compiler version

[cloudRoutine]

Is the FSC task going to be bundled with the target files in the FSharp.NET.Sdk nupkg?

[enricosada]

yes, temporary.
it's just an assembly inside package, imported by current target file
we make it work, and after we can coordinate/sendpr to microsoft/visualfsharp