workflows: follow up with 3 options if no issue is provided

Author: xunma

.pochi/workflows/create-pr.md

@@ -1,5 +1,5 @@
 Please help create a PR for the current staging changes, following these guidelines:
-- If an issue number is not provided, use askFollowupQuestion to ask for it. If user provides a valid issue number, link to the issue with `Resolves <ISSUE_NUMBER>` at the beginning of the PR description.
+- If an issue number is not provided, call askFollowupQuestion with 3 options: No issue, Provide the issue number, or Find issue for me. If a valid issue number is provided, prepend the PR description with `Resolves <ISSUE_NUMBER>`.
 - If there are no staging changes but there are uncommitted changes, please stage them first.
 - Create a branch name based on the current git diff status.
 - Write a meaningful commit message/PR title/PR description.