1.0.0

• ⭐️ NEW: Add option to resolve alerts on success.
• ⭐️ NEW: Add support for runbook-url input.
• Bump to Node 20 and ESM.
• Remove axios dependency in favour of native Node 20 fetch.
• Clean up the code and improve documentation.

Thanks to @illiriks, @hvoigt, @mattcollier, and @award28 for contributions.