feat(cli): add update command for ESEngine packages (#359)

* 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.

packages/tools/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@esengine/cli",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "description": "CLI tool for adding ESEngine ECS framework to existing projects",
   "type": "module",
   "main": "dist/index.js",