v5.4.2 — Client Switching Feature

🚀 New Feature

Seamless client switching — Switch between Execution Clients (Geth, Reth, Nethermind, Besu, Erigon) or Consensus Clients (Lighthouse, Nimbus, Teku, Lodestar) without a full reinstall.

• Preserves configs, JWT secret, ports, fee recipient, MEV-Boost, etc.
• Optional data directory cleanup with safety prompts
• Intelligent network & client detection
• Fully integrated into the TUI

Huge thanks to @b0a7 for this excellent contribution!

What's Changed

• Add switch_client.sh + TUI integration
• Tests and Docker test updates
• Minor header/source updates

Full Changelog: v5.4.1...v5.4.2