Fine-tune prompts. Closes #254

[Adam-it]

🎯 Aim

The aim is to upgrade prompts, especially setup and new to allow a more natural way to talk about those topics. In /new command the aim is to provide functionality to create a new project together with Copilot by providing the required information to create the yo scaffolding command

📷 Result

✅ What was done

• [X] Updated prompt grounding
• [X] Updated readme
• [X] Added new way to create new project together with Copilot

🔗 Related issue

Closes #254