Add dependency for DNSPod plugin

[Mchnan]

Because DNSPod plugin on pypi is very old, it still needs zope-interface to work. Fixes #2440

[nginxproxymanagerci]

Docker Image for build 1 is available on DockerHub:

nginxproxymanager/nginx-proxy-manager-dev:pr-5479

Note

Ensure you backup your NPM instance before testing this image! Especially if there are database changes.
This is a different docker image namespace than the official image.

Warning

Changes and additions to DNS Providers require verification by at least 2 members of the community!

[jc21]

Can you please comment and verify that the built image fixes the issue?

[Mchnan]

This PR successfully fixes the DNSPod plugin.

However, after double-checking similar proxy projects, I noticed they tend to deprecate this specific plugin in favor of the tencentcloud plugin.

Additional Context:
This plugin is heavily used within Mainland China. Unfortunately, a vast majority of Chinese tutorials still point to DNSPod, making many users (including myself) fall into this legacy trap. Breaking this inertia will be difficult in the short term without a major ecosystem shift. Therefore, maintaining this fix remains necessary for users relying on those older guides.