Add the rainwater harvesting potential estimator

[student-smritipandey]

This tool helps bridge that gap by providing personalized, data-driven calculations for rainwater harvesting potential. Users can estimate their harvested water, seasonal distribution, potential water loss, and water savings for multiple households. Additionally, it raises awareness with random water conservation quotes.
Dataset link: https://www.kaggle.com/datasets/rajanand/rainfall-in-india

🔄 Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• ⚡ Performance improvement

[github-actions]

Thanks for creating a PR for your Issue! ☺️

We'll review it as soon as possible.
In the meantime, please double-check the file changes and ensure that all commits are accurate.

If there are any unresolved review comments, feel free to resolve them. 🙌🏼

[student-smritipandey]

@AvishkarPatil added the file please verify it

[AvishkarPatil]

Its just Notebook >?

[student-smritipandey]

@AvishkarPatil Yes you can use this to show awareness in your web page by integrating with your project

[AvishkarPatil]

Hi @student-smritipandey , thank you for your contribution! While this feature isn’t a direct fit for the current scope of the JalWiKi project, I appreciate your effort and will consider your work for OSCI. Please feel free to contribute more ideas aligned with the project’s goals. Closing this PR for now - thanks again! 🙌