Improvement to "Copy to Clipboard" implementation guidance

[leapat]

I found the CHANGELOG.md clipboard guidance confusing to me. It said "To enable the new clipboard icon, you need to add code_clipboard: true to the frontmatter of source/index.html.md.", but the other steps needed aren't explicitly mentioned.
I only found them after clicking "this line" -> clicking into the commit -> then scrolling down to see the other code changes needed.

I'm unsure if I'm allowed to create a PR into slatedocs/slate to suggest changes and looks like the copy-to-clipboard functionality may change, so putting my proposal for improved guidance here in case anyone else needs it in the meantime:

To enable the clipboard icon, follow the code changes on this commit. If you always want the clipboard icon enabled, exclude the change in source/index.html.md and exclude <% if current_page.data.code_clipboard %> and <% end %> in source/layouts/layout.erb.

(I found the bool unnecessary in my implementation for my purposes)

[MasterOdin]

Something like this would be a good addition to the Wiki I think. Feel free to add a page and add it to the index?

[leapat]

Good idea, thank you for the suggestion @MasterOdin ! I added a new wiki page and put the link on the wiki homepage.