Integrate MathJax for math rendering fallback

[AlKYala]

We need to integrate MathJax into our Notation Census project to provide a fallback rendering solution for browsers that don't support MathML natively.

Tasks:

• [ ] Add MathJax library to base.njk
  • [ ] Include MathJax CDN script in the section
  • [ ] Configure MathJax to use MathML input
• [ ] Implement feature detection for native MathML support
• [ ] Create a fallback mechanism using MathJax for browsers without native MathML support
• [ ] Test MathJax rendering across different browsers
• [ ] Optimize MathJax loading for performance
• [ ] Update documentation to include information about MathJax integration
• [ ] Ensure MathJax correctly renders all existing mathematical notations in the project

Additional Notes:

• Consider lazy-loading MathJax for improved initial page load times
• Explore MathJax configuration options for optimal rendering and performance

Related resources:

• MathJax documentation: https://docs.mathjax.org/
• MathJax configuration options: https://docs.mathjax.org/en/latest/options/index.html