v2.1.0 - YouTube Demo & Terminology Cleanup

Changed

• Unified commands/skills terminology - Claude Code now uses "skills" for everything
  • Removed scanning of deprecated ~/.claude/commands/ directory
  • Only scans ~/.claude/skills/*/SKILL.md for user skills
  • Renamed "Claude Commands" sheet to "Built-in Commands" for clarity
  • Updated all documentation to reflect unified terminology

Added

• Watch It In Action section in README with YouTube demo link
• YouTube thumbnail for video demonstration

Fixed

• Cleaned up repository assets (removed redundant hero.png)
• Updated screenshots showing Built-in Commands sheet