feat: Interactive CLI Wizard with Customizable Stacks (Simple/MVC, Ruff, SQLModel)

[a6iyyu]

Description

This PR introduces an Interactive CLI Wizard to significantly improve the onboarding experience for new users.

Unlike standard scaffolding tools that enforce a single structure, this wizard adopts a Design Engineering approach, allowing developers to choose their stack based on project needs. It reduces "analysis paralysis" for beginners while offering robust tools for advanced users.

Key Features 🚀

• Interactive Wizard: Built with Typer and Rich for a guided, user-friendly experience.
• Flexible Architecture:
  • Simple: Flat layout for microservices/prototypes.
  • Advanced: Laravel-style MVC (app/controllers, app/models, views) for scalable apps.
• Stack Selection:
  • ORM: SQLModel, SQLAlchemy, or None.
  • Linter: Ruff (configured via .ruff.toml), Classic, or None.
  • Frontend: Optional Views support (HTML/CSS/JS + Jinja2).
• Auto-Configuration:
  • Generates .env with secure defaults.
  • Updates .gitignore automatically.
  • Generates clean requirements.txt (via uv export).

Screenshots 📸

Why this approach?

Instead of forcing a heavy structure (like MSSR) by default, this wizard respects the developer's choice. It keeps fastapi-new lightweight for simple tasks but powerful enough for full-stack applications.

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update (README updated automatically)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes