docs: add missing sections to table of contents

[Mohit-001-hash]

📝 Summary

This PR fixes a critical omission in the README.md file. Several major sections—Template Rendering, Performance, and Philosophy—were missing from the Table of Contents. I have updated the TOC to ensure all document sections are listed in the correct order so users can accurately navigate the framework's features.

🔗 Linked Issue

Closes #None

---

🔄 Type of Change

• 🐛 Bug fix
• ✨ New feature
• 📚 Documentation update
• ♻️ Code refactor
• ⚡ Performance improvement
• 🎨 UI/UX change

---

🛠️ What Was Changed

• Added the following missing sections to the Table of Contents in README.md:
  • [Template Rendering](#template-rendering)
  • [Performance](#performance)
  • [Philosophy](#philosophy)
• Verified the order matches the actual document structure.

---

🧪 Testing & Verification

• Visually verified the Markdown rendering to ensure the Table of Contents anchor links correctly navigate to their respective sections.

---

📋 Checklist

• My branch is up to date with main
• My commit messages are descriptive and clear
• I have tested the Markdown rendering locally

[vercel]

@Mohit-001-hash is attempting to deploy a commit to the Devanshu Tripathi's projects Team on Vercel.

A member of the Team first needs to authorize it.

[DevanshuTripathi]

Which summer of code are you a part of?

[Mohit-001-hash]

Girlscript summer of code

[Mohit-001-hash]

(gssoc)