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)

modules/features/test/test_detectors_regression.cpp

@@ -0,0 +1,59 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html
+
+#include "test_precomp.hpp"
+
+namespace opencv_test { namespace {
+const string FEATURES2D_DIR = "features2d";
+const string IMAGE_FILENAME = "tsukuba.png";
+const string DETECTOR_DIR = FEATURES2D_DIR + "/feature_detectors";
+}} // namespace
+
+#include "test_detectors_regression.impl.hpp"
+
+namespace opencv_test { namespace {
+
+/****************************************************************************************\
+*                                Tests registrations                                     *
+\****************************************************************************************/
+
+TEST( Features2d_Detector_SIFT, regression )
+{
+    CV_FeatureDetectorTest test( "detector-sift", SIFT::create() );
+    test.safe_run();
+}
+
+TEST( Features2d_Detector_FAST, regression )
+{
+    CV_FeatureDetectorTest test( "detector-fast", FastFeatureDetector::create() );
+    test.safe_run();
+}
+
+TEST( Features2d_Detector_GFTT, regression )
+{
+    CV_FeatureDetectorTest test( "detector-gftt", GFTTDetector::create() );
+    test.safe_run();
+}
+
+TEST( Features2d_Detector_Harris, regression )
+{
+    Ptr<GFTTDetector> gftt = GFTTDetector::create();
+    gftt->setHarrisDetector(true);
+    CV_FeatureDetectorTest test( "detector-harris", gftt);
+    test.safe_run();
+}
+
+TEST( Features2d_Detector_MSER, DISABLED_regression )
+{
+    CV_FeatureDetectorTest test( "detector-mser", MSER::create() );
+    test.safe_run();
+}
+
+TEST( Features2d_Detector_ORB, regression )
+{
+    CV_FeatureDetectorTest test( "detector-orb", ORB::create() );
+    test.safe_run();
+}
+
+}} // namespace