dns/ddclient: add button for manual push and live log to debug

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• [X ] I have read the contributing guide lines at https://github.com/opnsense/plugins/blob/master/CONTRIBUTING.md
• [ X] I have searched the existing issues, open and closed, and I'm convinced that mine is new.
• [ X] When the request is meant for an existing plugin, I've added its name to the title.

Is your feature request related to a problem? Please describe.
I seems that dyndns only gets updated when the IP changes? I´ve been running into problems where OPNSense isn´t updating the dyndns after a firmware upgrade or normal restart. So then when i confirm my settings it seems that there is no way to push an update. Whether if i change the current config or restart the service no new IP gets registered.

Describe the solution you'd like
So just a button to manually push would be nice. And: Live logging on what happens if i manually push. Just to debug problems.

Describe alternatives you've considered
Well, i´m currently running an extra linux server to just grab my IP and push it to my dyndns provider. As the dyndns client on opnsense doesn´t seem to work correctly. * I´m using strato as provider.

Start with the dns/ddclient plugin and read CONTRIBUTING.md before locating the existing configuration and service controls. Done should provide a manual update action and live logging that makes the update result debuggable, including for the reported Strato provider case.