feat: add emergency pause command to Makefile

[SynnekOG]

PR Description

Summary

This PR introduces an Emergency Commands section to the project’s Makefile, allowing maintainers to quickly respond to critical situations by pausing a deployed contract on mainnet.

Changes

• Makefile
  • Added Natspec-style section header for emergency commands.
  • Implemented emergency-pause target:
    • Sends a transaction to the deployed contract’s pause() function.
    • Requires CONTRACT_ADDRESS to be set.
    • Uses MAINNET_RPC_URL and PRIVATE_KEY for execution.
    • Includes a 🚨 console warning message for visibility.

Impact

• Provides maintainers with a fast, automated way to pause contracts during emergencies.
• Reduces the risk of manual mistakes by centralizing the emergency procedure.
• Improves operational safety by making critical commands easily discoverable and executable.

Next Steps

• Add an emergency-unpause command for recovery.
• Extend emergency tooling to support multiple networks (e.g., Polygon, Optimism).
• Consider role-based access safeguards when integrating with production workflows.