* feat(cli): add update command for ESEngine packages
- Add 'update' command to check and update @esengine/* packages
- Support --check flag to only show available updates without installing
- Support --yes flag to skip confirmation prompt
- Display package update status with current vs latest version comparison
- Preserve version prefix (^ or ~) when updating
- Bump version to 1.4.0
* chore: add changeset for CLI update command
* fix(cli): handle 'latest' tag in update command
- Treat 'latest' and '*' version tags as needing update
- Pin to specific version (^x.x.x) when updating from 'latest'
- Show '(pin version)' hint in update status output
* fix(cli): minimize file system race condition in update command
Re-read package.json immediately before writing to reduce the window
for potential race conditions between reading and writing.
* fix(cli): use atomic file write to avoid race condition
Write to temp file first, then rename for atomic update.
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