Node Checker: Security and Version Checks Enhancement

Description

This PR enhances the node checker with two important features:

1. SSH security check for default port usage
2. Comprehensive client version checks for all Ethereum clients

Changes

Security Enhancement

• Added check for SSH port 22 usage
• Provides warning when default SSH port is detected
• Encourages users to change to a non-standard port for better security

Version Checks

• Added version checks for all major Ethereum clients:
  • Execution clients (Geth, Nethermind, Besu, Erigon, Reth)
  • Consensus clients (Lighthouse, Lodestar, Teku, Nimbus, Prysm)
  • Validator clients
  • MEV-Boost
• Compares installed versions with latest GitHub releases
• Shows warnings for outdated versions

Testing

• Verified version comparison logic
• Confirmed warning messages for outdated versions
• Tested SSH port detection

Impact

• Helps users maintain up-to-date clients
• Improves security awareness
• Provides clear warnings for potential security risks
• Makes it easier to identify when updates are needed

Screenshots