Update sync-version.js to also run `cargo update -p agent-browser` after
updating Cargo.toml, keeping Cargo.lock in sync. Also update pre-commit
hook to stage Cargo.lock along with Cargo.toml.
This commit also brings Cargo.lock up to date (was stuck at 0.7.6).
Add automated verification that package.json and cli/Cargo.toml versions
stay in sync. This prevents version drift between the npm package and
Rust CLI binary.
- Add CI job to check version sync on push/PR
- Update pre-commit hook to sync versions automatically
- Update ci:version script to include version sync step
- Add check-version-sync.js script for CI validation
