Add jitpack preview action

[freya022]

Pull Request Etiquette

• [X] I have checked the PRs for upcoming features/bug fixes.
• [X] I have read the contributing guidelines.

Changes

• [ ] Internal code
• [ ] Library interface (affecting end-user code)
• [ ] Documentation
• [X] Other: CI/CD

Closes Issue: NaN

Description

Adds a sticky comment on non-draft PRs with instructions on how to use a preview of the PR

Note: You might want to disable "issue comments" in the webhook

Example: