Add script to detect empty cells in marimo notebooks

update

i can delete these files ... right?

Refactor HTML generation in build.py by modularizing components (format) into dedicated functions for better readability and maintainability.

switch default theme to light mode. Update HTML template to reflect the new default theme and enhance theme toggle functionality.

Add placeholder color for light theme in EVA search input for improved accessibility and user experience.

Enhance CSS transitions and animations for course components, improving visual effects during toggling. Introduce closing animations for inactive courses and staggered appearance for notebooks to enhance user experience.

Enhance course metadata processing and improve HTML/CSS structure for better theming and user experience. Clean up descriptions, implement light/dark mode support, and refine course display logic with improved search functionality.

Update course materials and assets across various sections, including functional programming, optimization, probability, and Python. Enhance HTML content and ensure consistency in asset management.

Add Neon Genesis Evangelion themed landing page