feat: Add comprehensive iconography system and enhance brand guidelines

- Add complete Iconography section with Coolicons v4.1 integration
- Implement theme-adaptive icons (black for light mode, white for dark mode)
- Add Visual Aid modal dialog for accessibility settings
- Replace theme toggle with semantic moon/sun icons
- Add personality trait icons with appropriate semantic choices
- Fix code block theming to respect light/dark mode toggle
- Include comprehensive icon categories: Interface, File/Data, Communication, Navigation
- Add detailed implementation guides for HTML, SVG, and Tailwind
- Create accessibility-aware color system with vision deficiency support
- Add Inconsolata and Inter Tight fonts for complete typography system

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

brand-assets/icons/coolicons.v4.1/coolicons SVG/Warning/Help.svg

@@ -0,0 +1,5 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<g id="Warning / Help">
+<path id="Vector" d="M8.19531 8.76498C8.42304 8.06326 8.84053 7.43829 9.40137 6.95899C9.96221 6.47968 10.6444 6.16501 11.373 6.0494C12.1017 5.9338 12.8486 6.02202 13.5303 6.3042C14.2119 6.58637 14.8016 7.05166 15.2354 7.64844C15.6691 8.24521 15.9295 8.95008 15.9875 9.68554C16.0455 10.421 15.8985 11.1581 15.5636 11.8154C15.2287 12.4728 14.7192 13.0251 14.0901 13.4106C13.4611 13.7961 12.7377 14.0002 12 14.0002V14.9998M12.0498 19V19.1L11.9502 19.1002V19H12.0498Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+</g>
+</svg>