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/misc/java/gen_dict.json

@@ -0,0 +1,12 @@
+{
+    "type_dict" : {
+        "Feature2D": {
+            "j_type": "Feature2D",
+            "jn_type": "long",
+            "jni_type": "jlong",
+            "jni_var": "Feature2D %(n)s",
+            "suffix": "J",
+            "j_import": "org.opencv.features.Feature2D"
+        }
+    }
+}