feat(library) add proxmox_sdn

[Derioss]

Thanks for your module, we added SDN features for our needs

[lae]

The proxmox_query is really only meant to be a diagnostic module (i.e. a module for collecting facts from the cluster to support other tasks), and not one for configuring PVE. And given there appear to already be set /cluster/sdn/?/? calls in proxmox_sdn.py, I'm not sure why the set /cluster/sdn is being separated out of it in 6a4f28c.

There also doesn't appear to be a way to use the proxmox_sdn module via the role in the current changeset. Please add the relevant task for managing it via role variables and documentation in the README. Since this is a big feature it should probably have its own section. See a42e6b5 for a decent (but simpler than this) example of adding a new management module.

[Derioss]

I admit I've enhanced the query module because I use it for other purposes (we have specific customized tasks files), but you're right that it's not logical to integrate the SDN application within the module itself. I should have a time slot available for testing in early September.

[Derioss]

And ensure that the PR matches the required logic. Thanks for your's work.