feat: FeFlood (#2487)

# Summary

Continuation of #2362 implementing `FeFlood` filter
https://www.w3.org/TR/SVG11/filters.html#feFloodElement

## Test Plan

Example app → Filters → `FeFlood`

## Compatibility

| OS      | Implemented |
| ------- | :---------: |
| iOS     |    ✅      |
| macOS   |    ✅ _*_      |
| Android |    ✅      |
| Web     |    ✅      |

_* `canvasWidth/canvasHeight` is incorrect on macOS, so there might be
some problems_

apple/Filters/RNSVGFeFlood.h

@@ -0,0 +1,9 @@
+#import "RNSVGBrush.h"
+#import "RNSVGFilterPrimitive.h"
+
+@interface RNSVGFeFlood : RNSVGFilterPrimitive
+
+@property (nonatomic, strong) RNSVGBrush *floodColor;
+@property (nonatomic, assign) CGFloat floodOpacity;
+
+@end

apple/Filters/RNSVGFeFlood.mm

@@ -0,0 +1,91 @@
+#import "RNSVGFeFlood.h"
+
+#ifdef RCT_NEW_ARCH_ENABLED
+#import <React/RCTConversions.h>
+#import <React/RCTFabricComponentsPlugins.h>
+#import <react/renderer/components/rnsvg/ComponentDescriptors.h>
+#import <react/renderer/components/view/conversions.h>
+#import "RNSVGConvert.h"
+#import "RNSVGFabricConversions.h"
+#endif // RCT_NEW_ARCH_ENABLED
+
+@implementation RNSVGFeFlood
+
+#ifdef RCT_NEW_ARCH_ENABLED
+using namespace facebook::react;
+
+// Needed because of this: https://github.com/facebook/react-native/pull/37274
++ (void)load
+{
+  [super load];
+}
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+  if (self = [super initWithFrame:frame]) {
+    static const auto defaultProps = std::make_shared<const RNSVGFeFloodProps>();
+    _props = defaultProps;
+  }
+  return self;
+}
+
+#pragma mark - RCTComponentViewProtocol
+
++ (ComponentDescriptorProvider)componentDescriptorProvider
+{
+  return concreteComponentDescriptorProvider<RNSVGFeFloodComponentDescriptor>();
+}
+
+- (void)updateProps:(Props::Shared const &)props oldProps:(Props::Shared const &)oldProps
+{
+  const auto &newProps = static_cast<const RNSVGFeFloodProps &>(*props);
+
+  id floodColor = RNSVGConvertFollyDynamicToId(newProps.floodColor);
+  if (floodColor != nil) {
+    self.floodColor = [RCTConvert RNSVGBrush:floodColor];
+  }
+  self.floodOpacity = newProps.floodOpacity;
+
+  setCommonFilterProps(newProps, self);
+  _props = std::static_pointer_cast<RNSVGFeFloodProps const>(props);
+}
+
+- (void)prepareForRecycle
+{
+  [super prepareForRecycle];
+  _floodColor = nil;
+  _floodOpacity = 1;
+}
+#endif // RCT_NEW_ARCH_ENABLED
+
+- (void)setFloodColor:(RNSVGBrush *)floodColor
+{
+  if (floodColor == _floodColor) {
+    return;
+  }
+  _floodColor = floodColor;
+  [self invalidate];
+}
+
+- (void)setFloodOpacity:(CGFloat)floodOpacity
+{
+  if (floodOpacity == _floodOpacity) {
+    return;
+  }
+  _floodOpacity = floodOpacity;
+  [self invalidate];
+}
+
+- (CIImage *)applyFilter:(NSMutableDictionary<NSString *, CIImage *> *)results previousFilterResult:(CIImage *)previous
+{
+  return [CIImage imageWithColor:[CIColor colorWithCGColor:[self.floodColor getColorWithOpacity:self.floodOpacity]]];
+}
+
+#ifdef RCT_NEW_ARCH_ENABLED
+Class<RCTComponentViewProtocol> RNSVGFeFloodCls(void)
+{
+  return RNSVGFeFlood.class;
+}
+#endif // RCT_NEW_ARCH_ENABLED
+
+@end

apple/ViewManagers/RNSVGFeFloodManager.h

@@ -0,0 +1,5 @@
+#import "RNSVGFilterPrimitiveManager.h"
+
+@interface RNSVGFeFloodManager : RNSVGFilterPrimitiveManager
+
+@end

apple/ViewManagers/RNSVGFeFloodManager.mm

@@ -0,0 +1,16 @@
+#import "RNSVGFeFloodManager.h"
+#import "RNSVGFeFlood.h"
+
+@implementation RNSVGFeFloodManager
+
+RCT_EXPORT_MODULE()
+
+- (RNSVGFeFlood *)node
+{
+  return [RNSVGFeFlood new];
+}
+
+RCT_EXPORT_VIEW_PROPERTY(floodColor, RNSVGBrush)
+RCT_EXPORT_VIEW_PROPERTY(floodOpacity, CGFloat)
+
+@end