Enhanced Artemis startup script

[kshitijk4poor]

📝 Description

This PR improves the scripts/start script by automatically creating a .env file if it's missing, allowing the setup process to continue without interruption.

also Automates the creation of docker-compose.dev.yaml if missing, streamlining local development setup and reducing manual steps for developers.

🔧 Changes

• ✨ Add automatic .env file creation from env.example
• 🔄 Continue setup process without pausing for manual .env creation
• 📋 Checks for an existing docker-compose.dev.yaml and uses it instead of creating a new one everytime.

🌟 Benefits

• Streamlined setup process for new users
• Reduced manual intervention during initial startup
• Improved user experience by providing clear instructions for future .env modifications
• streamlining local development setup and reducing manual steps for developers.

📚 Related Issues

closes #1174