Consider integrating .NET Core Debugger

[lambdakris]

Would it make sense to integrate the .NET Core Debugger into Ionide? Doing so would remove the need for users to install the OmniSharp C# extension in order to be able to use the .NET Core Debugger. To start with at least, the omnisharp-vscode package.json file contains the urls to the debuggers for the supported platforms.

[lambdakris]

I went ahead and opened dotnet/vscode-csharp#1364 in the OmniSharp vs code repo to float the idea there too. Please check that issue out if you have interest in this idea.

[ctaggart]

If the .NET Core Debugger enables source link support, this would be a great feature to have.

[enricosada]

@Krzysztof-Cieslak do you think there is an easy way (on ionide init maybe, or before FSAC init) to check if that package is installed? just to give a meaningfull error message