Improve onboarding and add beginner-friendly quickstart guide

[sarika-03]

Hi! I was exploring Celtrix and really liked the idea of simplifying full-stack setup.

I feel the project could benefit from clearer and more structured documentation, especially for beginners trying to get started.

Some suggestions:

• Add a step-by-step "Getting Started" or "Quickstart" guide
• Include a simple example of creating and running the first project
• Provide expected output so users know if they are on the right track
• Improve overall onboarding flow (install → setup → run)

I’d love to contribute by working on these improvements and can start with a small sample if that sounds helpful.

[github-actions]

Thank you for finding and contributing this unique issue! This appears to be a new problem that hasn't been reported before.

Your contribution helps make this project better. We appreciate you taking the time to report this! 🙏

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