Modify tool command to not require `dotnet`

[belav]

Currently csharpier is run with

dotnet csharpier .

But there is no reason to require the dotnet part and it could easily be just

csharpier .

This will be a breaking change. It would require updates to the IDE plugins, doc, etc.

Changing the assembly name to csharpier instead of dotnet-csharpier is all that is required.

[shocklateboy92]

You could just add both binaries. (Or maybe a symlink) That way you can add the new functionality without breaking anything.