Add comprehensive README.md file

[Copilot]

This PR adds a comprehensive README.md file to the personal website repository that was previously missing documentation.

What's Added

The new README.md includes:

• Project Overview: Clear description of the personal website for Andrin Schaller
• Tech Stack Documentation: Complete list of technologies used (Next.js 15, TypeScript, Tailwind CSS 4, Radix UI, etc.)
• Quick Start Guide: Step-by-step setup instructions for developers
• Available Scripts: Documentation of all npm commands with descriptions
• Project Structure: Visual breakdown of the codebase organization
• Features: Highlighting of key website capabilities
• Contact Information: All social links and contact methods
• License & Contributing: Guidelines for the repository

Why This Matters

A good README is essential for any repository as it:

• Helps new contributors understand the project quickly
• Provides clear setup instructions
• Documents the technology choices and project structure
• Serves as the first impression for visitors to the repository

The README follows modern documentation best practices with emojis for visual appeal, code blocks for commands, and a logical structure that guides readers from overview to implementation details.

All existing functionality remains unchanged - this is purely additive documentation that enhances the repository without affecting the codebase.

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.