chore: add project metadata to Cargo.toml

feat(ui): add horizontal scroll, side-by-side view, and hunk navigation

refactor(commit): reorder strip-then-extract pipeline to avoid prose leaking into output

refactor(clean): extract helper functions and strip think blocks from response

feat(build): add automated multi-platform

docs(readme): rewrite README with comprehensive documentation

refactor(ui): add focus cycling, improve diff display, and use OnceLock for HTTP clients

feat: initial commit for gitclaw TUI

Initial commit