docs: consolidate documentation into README.md and CLAUDE.md

[okotaku]

Summary

• Consolidate all documentation from docs/ directory into root-level README.md and CLAUDE.md
• Remove documentation build infrastructure and dependencies
• Simplify project structure by eliminating separate documentation builds

Changes Made

📁 Documentation Consolidation

• README.md: Enhanced with comprehensive project documentation, installation guides, and usage examples
• CLAUDE.md: Expanded with complete AI development workflows and Claude Code setup guide
• CHANGELOG.md: Moved from docs/changelog.md to project root for easy access

🗑️ Removed Documentation Infrastructure

• Configuration Files: Deleted .readthedocs.yaml
• GitHub Actions: Removed docs.yml and reusable-docs-build.yml workflows
• Dependencies: Removed all Sphinx and documentation-related dependencies from pyproject.toml
• Docker: Removed template-docs service from docker-compose.yml
• Directory: Completely removed docs/ directory and all contents

🔧 Updated References

• Updated GitHub Actions workflows to remove documentation jobs
• Updated workflow descriptions to remove docs references
• Clean uv.lock file without unused documentation dependencies
• Updated project structure documentation to reflect changes

Benefits

✅ Simplified Structure: No more separate documentation builds or complex setup
✅ Faster Setup: Reduced dependencies and faster installation
✅ Easy Access: All documentation at project root level
✅ Maintained Content: All valuable documentation content preserved and enhanced
✅ AI-First Focus: Enhanced CLAUDE.md with comprehensive AI development workflows

Test Plan

• Verify all essential documentation content is preserved
• Confirm GitHub Actions workflows pass without docs jobs
• Test clean dependency installation with uv sync --all-extras
• Validate markdown formatting and linting
• Ensure project structure is clean and accessible

🤖 Generated with Claude Code