Add VariableBlurEffect

Sources/OpenSwiftUICore/Graphic/BlurStyle/VariableBlurEffect.swift

@@ -0,0 +1,36 @@
+//
+//  VariableBlurEffect.swift
+//  OpenSwiftUICore
+//
+//  Audited for 6.5.4
+//  Status: Blocked by Image resolving
+//  ID: 6A2330B0C22A93F083499CFD6C3BD5B1 (SwiftUICore)
+
+public import Foundation
+
+// MARK: - VariableBlurEffect
+
+private struct VariableBlurEffect: EnvironmentalModifier, Equatable {
+    var radius: CGFloat
+    var mask: Image
+    var isOpaque: Bool
+
+    typealias ResolvedModifier = VariableBlurStyle
+
+    func resolve(in environment: EnvironmentValues) -> VariableBlurStyle {
+        // TODO: Image resolving
+        return VariableBlurStyle(
+            radius: radius,
+            isOpaque: isOpaque,
+            mask: .none
+        )
+    }
+}
+
+@_spi(Private)
+@available(OpenSwiftUI_v5_0, *)
+extension View {
+    nonisolated public func variableBlur(maxRadius: CGFloat, mask: Image, opaque: Bool = false) -> some View {
+        modifier(VariableBlurEffect(radius: maxRadius, mask: mask, isOpaque: opaque))
+    }
+}