Add support for Cursor.sh (VSCode fork)

[deikka]

It would be great to have Crusor.sh supported here :)

[jhirn]

Here's a workaround until the PR gets merged:

if defined?(BetterErrors) && ENV['EDITOR'] == 'cursor -w'
  BetterErrors.editor = 'cursor://file/%<file>s:%<line>s'
end

/cc @deikka thanks for the PR. I think he wants that line removed so it can be considered for merging. Doesn't seem like this releases often but it would improve our chances of it getting in. =)