Add a reference to this repository in the generated docs

[nikita-volkov]

After generate-docs add a step that replaces all the occurrences of the following snippet

<a id="switch-light-dark-mode" class="nav-option">Switch Light/Dark Mode</a>

with the following:

<a id="switch-light-dark-mode" class="nav-option">Switch Light/Dark Mode</a> <a href="{{this-repo-at-current-commit}}" target="_blank" title="View on GitHub" class="nav-option"><svg height="20" width="20" viewBox="0 0 16 16" fill="currentColor" aria-hidden="true" style="display:inline-block;vertical-align:middle;"><path d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.19 0 .21.15.46.55.38A8.013 8.013 0 0 0 16 8c0-4.42-3.58-8-8-8z"></path></svg></a>

where {{this-repo-at-current-commit}} needs to be replaced accordingly.