* refactor(math): update LaTeX guide and enhance KaTeX integration
- Revised the LaTeX documentation for clarity and improved structure, changing section titles and descriptions for better understanding.
- Added support for chemistry expressions using the mhchem extension.
- Introduced a new KaTeX CSS loader partial to streamline the integration of KaTeX, allowing for configurable remote or local asset loading.
- Updated the head partial to utilize the new KaTeX loader, enhancing the flexibility of math rendering options.
* refactor(mathjax): simplify MathJax script URL configuration
- Removed the dynamic version assignment for MathJax and set a fixed version in the script URL for consistency and clarity.
* docs(latex): enhance LaTeX guide and clarify chemistry expressions
- Updated section titles for better clarity, changing "Supported Functions" to "Chemistry Expressions."
- Improved description of the mhchem extension for rendering chemistry equations.
- Removed redundant instructions regarding the passthrough extension in Hugo.
- Corrected minor typographical errors in references to MathJax.
