Add triage workflow for pull requests

[BenHall-1]

Description

Type of Change

• Bug fix
• New feature
• Breaking change

Testing

Checklist

• My code follows the style of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works