docs: finish tutorial pages on fundamentals

[RussellSB]

Overview

This PR completes the tutorial documentation for the fundamentals section of pytrendy, introducing enhanced documentation features and making the learning resources more comprehensive and accessible.

New Documentation Features

Added Tools & Dependencies

This PR introduces mkdocs-jupyterlite to the docs dependancies:

• mkdocs-jupyterlite (0.4.1) - Enables interactive Jupyter notebooks directly in the browser without requiring a backend server, allowing users to run Python code and experiments directly from the documentation

Enhanced Documentation Configuration

• Interactive fundamentals tutorials now embedded as executable notebooks:
  • examples/fundamentals/gradual.ipynb
  • examples/fundamentals/abrupt.ipynb
  • examples/fundamentals/noise.ipynb
• Improved code syntax highlighting and inline code execution
• Advanced markdown extensions for better content formatting
• Auto-generated API reference section with full namespace documentation

Key Improvements

• ✅ Finished all remaining tutorial pages in the fundamentals documentation
• ✅ Added interactive notebook support for hands-on learning
• ✅ Enhanced content completeness to support new users learning the library
• ✅ Maintains consistency with existing documentation standards
• ✅ Enables users to experiment with code directly in the browser

Testing

All changes are documentation-only, so no additional testing is required beyond documentation review. The interactive notebooks can be tested by building and viewing the documentation locally.

---

To build and preview the documentation locally:

pip install -e ".[docs]"
mkdocs serve

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[RussellSB]

Note: for some reason git not letting me delete quickstart.md due to merge conflicts with develop. Even when trying to resolve it as a merge conflict. Will just accept develop even though outdated, and try deleting it in a following PR.