Integrate Dynamic DNS Support

[DanielLester83]

Is your feature request related to a problem? Please describe. ISPs changing your ip address.

Describe the solution you'd like An integrated setup page for freedns.

for example see: https://freedns.afraid.org/dynamic/

Describe alternatives you've considered A cron command can be added manually at the command line.

Additional context Wireguard and OpenVPN benefit from using Dynamic Dns.

[billz]

This could be a good candidate for an extensible plugin architecture https://github.com/RaspAP/raspap-webgui/discussions/1052

[billz]

https://docs.raspap.com/dynamicdns/