[feature] Re-usable pagination class for DRF views

[pandafy]

Is your feature request related to a problem? Please describe.
Currently, when using Django Rest Framework (DRF) in different OpenWISP modules or projects, pagination logic is often repeated or inconsistently implemented. This leads to duplicated code and inconsistent pagination behavior across APIs.

Describe the solution you'd like
Create a re-usable, pagination class for DRF views in openwisp-utils, which can be easily shared and imported across other OpenWISP modules. The class should provide sensible defaults and allow for settings overrides. Proper documentation should be included and usage should be demonstrated with examples.

[nemesifier]

@pandafy can you add a few links to API endpoints where we have implemented pagination?

[pandafy]

This search result shoiuld highlight all the API views where we are creating dedicated pagination class https://github.com/search?type=code&q=org%3Aopenwisp+%22PageNumberPagination%29%22

[pushpitkamboj]

I will work on this issue.

[Srinath0916]

Hey @pandafy , I’d like to take this up.
I’ll start by adding a reusable pagination class to openwisp-utils with sensible defaults and settings overrides, along with docs and basic tests.
I’ll open a PR for the base class first so we can review the approach, and then we can look at migrating individual modules incrementally if that makes sense.
Let me know if there’s anything specific you’d like me to keep in mind.