Open a GitHub repository from selected text in AUTHOR/REPO format.
Select text such as octocat/Hello-World and choose the generated repository
action. The selection must match the AUTHOR/REPO format. You can optionally
configure your own GitHub username to show a second action that opens the same
repository name under your account.
The extension only constructs and opens github.com URLs; it does not call the
GitHub API or transmit the selection anywhere else.