RenameCommandFilter -> FSharp.Editing

[cloudRoutine]

This looks to be a tricky migration

canRename will need to take a Point for caretPosition and a filepath for the current document rename (the first one) needs to change to only manipulate the buffer on the FSharp.Editing side and return a changeset to the Logic/VsIntegration side.

@vasily-kirichenko I'm not sure about the rest of this, I'll fill in the rest of the details later when I have a better understanding of how this can work (or you can edit this issue with what needs to be done :wink: )

Code Located @ https://github.com/fsprojects/VisualFSharpPowerTools/blob/master/src/FSharp.Editing.VisualStudio/Symbol/RenameCommandFilter.fs