Rider integration

[nojaf]

It would be nice if we could combine this with Rider. I've tried it out, but it was unclear from the Rider side of things that the language-server was called.

Maybe @auduchinok has any ideas if this could be feasible.

[georgewfraser]

The code that launches the language server is in extension.ts

There's two standalone executables that are packaged with the extension, one for windows, one for mac. The code that toggles between them is here

If you run build.sh it will generate a file build.vsix in the root directory, which is just a regular zip file that contains the executables I just described.