Create a comment with a link to create a pull request #15836
Description
Some projects prefer their agents push a branch and provide a link to create a pull request in its response instead of directly creating the PR itself.
This will come as a total shock, but I am very interested in PR review workflows... There are some interesting PR Review edge cases where this is nice -- for example the author of the PR can't "approve|request changes" on a PR they author. So, if you have a workflow that makes the PR and a workflow that reviews PRs, you won't get an automated "approval" as both are done by the same "author" (github-actions[bot]).
GitHub allows you to embed the branch title and body of a pull request into a hyperlink. Enabling a Create a PR experience. I'm not sure exactly what the best ergonomics would be for the safe output but perhaps something like create-comment-with-pull-request-link which takes pr-title, pr-body, comment-body, etc.
It would then post a comment with the comment-body and then include a link to make the PR in the footer (or something similar).