Enhance README with visual improvements and codify documentation standards

- Added emojis, checkboxes, and status indicators throughout README
- Improved tables with status columns and visual indicators
- Fixed ASCII diagram spacing and added emojis for clarity
- Added table of contents with emoji indicators
- Enhanced visual hierarchy with badges, blockquotes, and formatting
- Added comprehensive documentation visual standards to CONTEXT.md
  - Section 9.2 documents emoji usage, checkboxes, tables, ASCII diagrams
  - Establishes consistent visual standards for all projects using template
- All pre-commit checks passing

Author: christopherpaquin