[feature request] Yank to clipboard

[softmoth]

From issue #30:

please modify/add feature that the text copied using "yank" commands like "y$" Y" etc... will be copied to the clipboard so that the copied text can be pasted to other places

[softmoth]

It may be enough to just ensure that this plugin works fine, and refer to it in the README: https://github.com/kutsan/zsh-system-clipboard

See this comment for more thoughts:
#36 (comment)