feat: add Statamic 5 support

[stefangalescu]

❓ Type of change

• [ ] 📖 Content (updates to the content, documentation, API reference or README)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality, like performance)
• [x] ✨ New feature (a non-breaking change that adds functionality)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR adds support for Statamic 5 & Laravel 11 as well as updates the testing and CI/CD setup.