Initial Proof of concept demo

• Single route, GET localhost:8000/api/test-demo-service
• Single contract and implementation IDemoService/DemoService

What's Changed

• [feat] Demo service with Contract specification by @kernel-memory-dump in #1

New Contributors

• @kernel-memory-dump made their first contribution in #1

Full Changelog: https://github.com/kernel-memory-dump/dependency-injection-test-laravel/commits/v1.0.0