feat(cli): add update checks

[CorieW]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces update checking functionality to the Genkit CLI, allowing users to be notified when newer versions are available. The feature includes comprehensive configuration options and platform-aware update instructions.

• Adds update notification system with support for both npm and binary installations
• Implements user configuration to opt-out of update notifications
• Provides platform-specific update instructions for different installation methods

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
genkit-tools/cli/src/utils/updates.ts	Core update checking logic with npm registry and GCS integration
genkit-tools/cli/tests/utils/updates_test.ts	Comprehensive test suite covering all update functionality scenarios
genkit-tools/cli/src/commands/config.ts	Adds configuration option for disabling update notifications
genkit-tools/cli/src/cli.ts	Integrates update checking into CLI startup flow
genkit-tools/cli/package.json	Updates dependencies and build configuration for version handling

Files not reviewed (1)

• genkit-tools/pnpm-lock.yaml: Language not supported

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[pavelgj]

please sync to head on main, it should fix the go build error