Workflows for compiling Geant4 on mac

Builds

• Geant4 (4.10.7, 4.11.0, 4.11.1, 4.11.2, 4.11.3)
• Apple and Intel silicon (macOS-14, macOS-15, macOS-15-intel)

Usage

• Update .github/workflows/main.yaml
• Tag
• Push (inc tag)
• Create release

Workflows run on tag-push and will create a release and upload artifacts