Merge pull request #26405 from kaingwade:rename_features2d

Rename features2d #26405

This PR renames the module _features2d_ to _features_ as one of the Big OpenCV Cleanup #25007. 
Related PR: opencv/opencv_contrib: [#3820](https://github.com/opencv/opencv_contrib/pull/3820) opencv/ci-gha-workflow: [#192](https://github.com/opencv/ci-gha-workflow/pull/192)

samples/python/plane_tracker.py

@@ -4,7 +4,7 @@
 Multitarget planar tracking
 ==================
 
-Example of using features2d framework for interactive video homography matching.
+Example of using "features" framework for interactive video homography matching.
 ORB features and FLANN matcher are used. This sample provides PlaneTracker class
 and an example of its usage.