Rewrite documentation for clarity, consistency, and token efficiency (#9)

Major revisions to all three primary documentation files to ensure they are:
- In sync with each other (consistent information)
- Accurate to v1.3.0 (21 scripts across 5 categories)
- Concise and token-optimized (especially SKILL.md as entry point)
- Clear and objective (no hype, no emojis)
- Properly structured for their audience

SKILL.md (Entry Point)
- Clean table of contents of all 21 scripts organized by category
- Brief descriptions with key options for each script
- Quick start section with 5 essential steps
- Common patterns explanation
- Requirements and documentation links
- Design principles
- Minimal body text - TOC is the main reference
- Token-optimized for Claude Code consumption

CLAUDE.md (Developer Guide)
- Project overview with accurate statistics
- Repository structure diagram
- Architecture patterns (class-based design, auto-UDID, output formatting, batch ops)
- Script categories with implementation notes
- Shared utilities documentation
- Quality standards and testing requirements
- Integration points between scripts
- Contribution guidelines
- Release process
- Design philosophy

README.md (User-Facing)
- What it does (semantic vs pixel-based navigation)
- Key features (21 scripts, token efficiency, zero-config)
- Installation options (personal, project, from release)
- Prerequisites and quick start
- 21 scripts listed by category
- How it works with Claude Code
- 5 complete usage examples
- Design principles
- Output efficiency comparison table
- Troubleshooting guide
- Contributing and support

Consistency Across All Three
- Same script counts and categories
- Same version number (1.3.0)
- Same core design principles
- Cross-linking between documents
- Consistent tone (professional, objective, fact-based)

Token Efficiency
- Removed all marketing language
- Removed all emojis
- Focused on facts and capabilities
- Clear, concise language throughout
- Minimal repetition

🤖 Generated with Claude Code

Co-authored-by: Claude <noreply@anthropic.com>

Author: conorluddy