Convert ReactScrollView and ReactNestedScrollView to Kotlin

Summary:
Convert `ReactScrollView.java` to `ReactScrollView.kt` and update the `generate-nested-scroll-view.js` script to generate `ReactNestedScrollView.kt` from the Kotlin source.

Key changes:
- `ReactScrollView.java` replaced by idiomatic `ReactScrollView.kt`
- `ReactNestedScrollView.java` replaced by generated `ReactNestedScrollView.kt`
- Generation script updated for Kotlin source/output file paths and transformations
- BUCK file updated to reference `.kt` files in the verification genrule
- `ReactScrollViewManager.kt` updated to use Kotlin property access syntax for `scrollEnabled`, `stateWrapper`, and `fadingEdgeLengthStart/End`
- Public API surface preserved: only additive `synthetic` constructor from `JvmOverloads`

Changelog:
[Android][Changed] - Convert `ReactScrollView` and `ReactNestedScrollView` from Java to Kotlin

Differential Revision: D107236882

Author: cortinico

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -5598,6 +5598,7 @@ public final class com/facebook/react/views/scroll/ReactHorizontalScrollViewMana
 public class com/facebook/react/views/scroll/ReactScrollView : android/widget/ScrollView, android/view/View$OnLayoutChangeListener, android/view/ViewGroup$OnHierarchyChangeListener, com/facebook/react/uimanager/ReactClippingViewGroup, com/facebook/react/uimanager/ReactOverflowViewWithInset, com/facebook/react/views/scroll/ReactAccessibleScrollView, com/facebook/react/views/scroll/ReactScrollViewHelper$HasFlingAnimator, com/facebook/react/views/scroll/ReactScrollViewHelper$HasScrollEventThrottle, com/facebook/react/views/scroll/ReactScrollViewHelper$HasScrollState, com/facebook/react/views/scroll/ReactScrollViewHelper$HasSmoothScroll, com/facebook/react/views/scroll/ReactScrollViewHelper$HasStateWrapper, com/facebook/react/views/scroll/VirtualViewContainer {
 	public fun <init> (Landroid/content/Context;)V
 	public fun <init> (Landroid/content/Context;Lcom/facebook/react/views/scroll/FpsListener;)V
+	public synthetic fun <init> (Landroid/content/Context;Lcom/facebook/react/views/scroll/FpsListener;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public fun abortAnimation ()V
 	public fun dispatchGenericMotionEvent (Landroid/view/MotionEvent;)Z
 	public fun draw (Landroid/graphics/Canvas;)V