message: Implement `gx` (open hyperlink)
  Vim's `gx` can actually do much more than open links, but that other stuff is non-trivial and not obviously useful, so I'll wait for someone to complain about it.
  Fixes
diff: @@ -2581,6 +2581,17 @@ class CommandGoToDefinition extends BaseCommand {
  }
  }
  +@RegisterAction
  +class CommandOpenLink extends BaseCommand {
  + modes = [Mode.Normal, Mode.Visual, Mode.VisualLine, Mode.VisualBlock];
  + keys = ['g', 'x'];
  +
  + public async exec(position: Position, vimState: VimState): Promise<VimState> {
  + vscode.commands.executeCommand('editor.action.openLink');
  + return vimState;
  + }
  +}
  +
  @RegisterAction
  class CommandGoBackInChangelist extends BaseCommand {
  modes = [Mode.Normal];
  