- Improve site navigation and content structure
- Update development testing documentation
- Enhance site styling and visual consistency
- Update release notes and milestone templates
- Improve site rebuild script functionality
- Removed emojis from all section headers (## and ###)
- Reduced emojis in body text and callout boxes
- Standardized link references (removed emoji prefixes)
- Maintained professional tone while keeping content accessible
- Updated quickstart-guide, student-workflow, tito-essentials, faq, datasets, community, resources, testing-framework, learning-progress, checkpoint-system, and all chapter files