Added a CSS Solar System in frontend projects

[arzoosingh147]

Closes: #1027

• Title: CSS Solar System
• Name: Arzoo Singh
• Idenitfy yourself: gssoc-extd

Describe the add-ons or changes you've made 📃

The CSS Solar System is a visually immersive representation of our solar system, crafted entirely with HTML and CSS. This project features a realistic arrangement of planets orbiting the sun, each with carefully scaled sizes and orbital paths. Through the use of CSS animations and transformations, each planet follows its unique orbit, capturing the beauty and motion of celestial bodies. This project demonstrates creative and technical CSS skills by simulating complex motion without JavaScript, offering an interactive and educational visualization of the solar system for viewers.

Screenshots 📷

Type of change ☑️

What sort of change have you made:

• [X] New feature (non-breaking change which adds functionality)
• [X] This change requires a documentation update

Checklist: ☑️

• [X] My code follows the Contributing Guidelines & Code of Conduct of this project.
• [X] This PR does not contain plagiarized content.
• [X] I have performed a self-review of my own code.
• [X] I have commented my code, particularly wherever it was hard to understand.
• [X] My changes generate no new warnings.

Note to reviewers 📄

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