Add version update checker for worker CLI

[lgingerich]

Context

This PR addresses #413

Implementation

• Add automatic version checking that runs once per day on first CLI usage (checks every 24 hours)
• Check GitHub API for latest releases and compare with current version
• Display user-friendly update notifications with installation command
• Cache check results to prevent duplicate notifications and API calls
• Store cache in user home directory (~/.prime_worker_version_check)

Example

Below is the message shown to users when a new update is available:

╔════════════════════════════════════════════════════════════════════════════════╗
║                              📦 UPDATE AVAILABLE                               ║
╚════════════════════════════════════════════════════════════════════════════════╝
⚠ A newer version of Prime Worker is available!
Current Version: 0.2.10
Latest Version: 0.2.11
Update Command: curl -sSL https://raw.githubusercontent.com/PrimeIntellect-ai/protocol/main/crates/worker/scripts/install.sh | bash
Release Notes: https://github.com/PrimeIntellect-ai/protocol/releases/tag/v0.2.11