Update documentation to reflect current project structure and features

[Null000]

Summary

This PR updates the CLAUDE.md documentation to accurately reflect the current state of the cat-math project, including recent additions to the RPG module, new problem types, and build/deployment infrastructure.

Key Changes

• Removed pixi-filters dependency from the tech stack (no longer used)
• Added Comparison problem generator to the math categories (now 31 total categories across 5 groups)
• Expanded RPG module documentation with new files:
  • index.html for category selection
  • actors.html debug playground
  • rpgIndex.ts and actors.ts entry points
  • ProblemUI.ts for in-battle math problem display
  • areas.ts for progression/wave definitions
  • backgroundMaker.ts for sprite generation
  • wizardMaker.ts helper for wizard factory
• Updated build scripts with new deployment utilities (pages.sh, pages-beta.sh, pages-rpg.sh)
• Simplified dev commands (removed separate build:rpg and dev:rpg commands)
• Added new commands (bun run sim for battle simulation, bun run debug)
• Updated code style guidelines:
  • Changed indentation from 2-space to tab (size 4)
  • Added documentation for const object enums (EnemyType, BackgroundType)
  • Added area/progression pattern documentation
• Enhanced interface documentation with comparison problem options and category grouping structures
• Added new LocalStorage key for RPG XP tracking
• Updated testing notes to mention actors.html as debug playground
• Added favicon and bun.lock to file structure

Notable Details

• Problem interface now includes optional options field for multiple-choice comparison problems
• Category groupings now support both math-type and Slovenian school year organization
• Enemy factory expanded to 21 enemy types with dedicated wizard factory helper
• Build process now includes favicon copying

https://claude.ai/code/session_015zSvxuqK3KeB1KtmdCsvNi