Improve handling of xml documentation tags
Improve handling of xml documentation tags

* Treating the content of <see> as code in the same way as <c>
* Strip out <remarrks> and leave the inner content
* Replace <param name="N">content</param> with `N` - content (and the same for typeparam)
* Currently still not working completely when param tags span multipl lines, since JS doesn't support RegexOptions.SingleLine. Tried using [\s\S] instead of the dot patter, but couldn't get it to work, even though it works in online regex debuggers in JS mode

ionide/ionide-vscode-fsharp,ionide/ionide-vscode-fsharp