Add Pinggy port forwarding support with clear SSH password instructions

[jrdevadattan]

This pull request introduces Pinggy as a new port forwarding service in zphisher-jr, enhancing flexibility for users.

Key features:

• Starts the local server on a user-specified port.
• Establishes an SSH tunnel with Pinggy forwarding that local port.
• Automatically accepts SSH fingerprints (StrictHostKeyChecking=no).
• Displays a prominent bold red message alerting users that the SSH password is literally blank and must be typed when prompted.
• Runs the SSH tunnel in the background, enabling continuous data capture.
• Leverages existing functions for URL display and visitor data capture.

This integration improves user experience by simplifying setup and providing clear connection instructions.