Merge pull request #25986 from asmorkalov:as/js_for_contrib

Split Javascript white-list to support contrib modules #25986

Single whitelist converted to several per-module json files. They are concatenated automatically and can be overriden by user config.

Related to https://github.com/opencv/opencv/pull/25656

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

modules/imgproc/misc/js/gen_dict.json

@@ -0,0 +1,95 @@
+{
+    "whitelist":
+    {
+        "": [
+            "Canny",
+            "GaussianBlur",
+            "Laplacian",
+            "HoughLines",
+            "HoughLinesP",
+            "HoughCircles",
+            "Scharr",
+            "Sobel",
+            "adaptiveThreshold",
+            "approxPolyDP",
+            "arcLength",
+            "bilateralFilter",
+            "blur",
+            "boundingRect",
+            "boxFilter",
+            "calcBackProject",
+            "calcHist",
+            "circle",
+            "compareHist",
+            "connectedComponents",
+            "connectedComponentsWithStats",
+            "contourArea",
+            "convexHull",
+            "convexityDefects",
+            "cornerHarris",
+            "cornerMinEigenVal",
+            "createCLAHE",
+            "createLineSegmentDetector",
+            "cvtColor",
+            "demosaicing",
+            "dilate",
+            "distanceTransform",
+            "distanceTransformWithLabels",
+            "drawContours",
+            "ellipse",
+            "ellipse2Poly",
+            "equalizeHist",
+            "erode",
+            "filter2D",
+            "findContours",
+            "fitEllipse",
+            "fitLine",
+            "floodFill",
+            "getAffineTransform",
+            "getPerspectiveTransform",
+            "getRotationMatrix2D",
+            "getStructuringElement",
+            "goodFeaturesToTrack",
+            "grabCut",
+            "integral",
+            "integral2",
+            "isContourConvex",
+            "line",
+            "matchShapes",
+            "matchTemplate",
+            "medianBlur",
+            "minAreaRect",
+            "minEnclosingCircle",
+            "moments",
+            "morphologyEx",
+            "pointPolygonTest",
+            "putText",
+            "pyrDown",
+            "pyrUp",
+            "rectangle",
+            "remap",
+            "resize",
+            "sepFilter2D",
+            "threshold",
+            "warpAffine",
+            "warpPerspective",
+            "warpPolar",
+            "watershed",
+            "fillPoly",
+            "fillConvexPoly",
+            "polylines"
+        ],
+        "CLAHE": ["apply", "collectGarbage", "getClipLimit", "getTilesGridSize", "setClipLimit", "setTilesGridSize"],
+        "segmentation_IntelligentScissorsMB": [
+            "IntelligentScissorsMB",
+            "setWeights",
+            "setGradientMagnitudeMaxLimit",
+            "setEdgeFeatureZeroCrossingParameters",
+            "setEdgeFeatureCannyParameters",
+            "applyImage",
+            "applyImageFeatures",
+            "buildMap",
+            "getContour"
+        ]
+    }
+}