- Close #4 Replace standalone binaries with subcommands
- Close #9 Refactor CLI options for better ABI version handling
- Close #5 Add new subcommand to replace cargo-generate
- Add comprehensive documentation and professional code comments

This release establishes a unified architecture with three cohesive subcommands:
- new: Create extension projects with proper scaffolding
- build: Compile and package with intelligent defaults
- package: Low-level metadata appending for existing libraries