Add a method of showing end columns of matches for better Vim compatibility

Describe your feature request

Currently rg only shows the start columns for matches. This makes it not ideal for Vim/Neovim use since the internal :vimgrep command does output start and end columns. When using rg the end_col value for matches is set to 0. Since the --vimgrep option already exists, the end columns could be shown only with that option or a --end-column option could also be provided.