[Repo Assist] Add copy-to-clipboard button to code blocks#998

nojaf merged 7 commits intomainfsprojects/FSharp.Formatting:mainfrom

repo-assist/fix-issue-72-copy-code-to-clipboard-e89f0c91d528a99afsprojects/FSharp.Formatting:repo-assist/fix-issue-72-copy-code-to-clipboard-e89f0c91d528a99aCopy head branch name to clipboard