refactor: simplify environment key handling with @Entry properties

Sources/ButtonKit/Modifiers/Button+AsyncDisabled.swift

@@ -43,30 +43,8 @@ extension View {
 
 // MARK: SwiftUI Environment
 
-struct AllowsHitTestingWhenLoadingKey: EnvironmentKey {
-    static let defaultValue: Bool = false
-}
-
-struct DisabledWhenLoadingKey: EnvironmentKey {
-    static let defaultValue: Bool = false
-}
-
 extension EnvironmentValues {
-    var allowsHitTestingWhenLoading: Bool {
-        get {
-            return self[AllowsHitTestingWhenLoadingKey.self]
-        }
-        set {
-            self[AllowsHitTestingWhenLoadingKey.self] = newValue
-        }
-    }
+    @Entry var allowsHitTestingWhenLoading: Bool = false
 
-    var disabledWhenLoading: Bool {
-        get {
-            return self[DisabledWhenLoadingKey.self]
-        }
-        set {
-            self[DisabledWhenLoadingKey.self] = newValue
-        }
-    }
+    @Entry var disabledWhenLoading: Bool = false
 }

Sources/ButtonKit/Style/Button+AsyncStyle.swift

@@ -85,19 +85,8 @@ extension AsyncButtonStyle where Self == OverlayAsyncButtonStyle {
     }
 }
 
-struct AsyncButtonStyleKey: EnvironmentKey {
-    static let defaultValue: AnyAsyncButtonStyle = AnyAsyncButtonStyle(.auto)
-}
-
 extension EnvironmentValues {
-    var asyncButtonStyle: AnyAsyncButtonStyle {
-        get {
-            return self[AsyncButtonStyleKey.self]
-        }
-        set {
-            self[AsyncButtonStyleKey.self] = newValue
-        }
-    }
+    @Entry var asyncButtonStyle: AnyAsyncButtonStyle = .init(.auto)
 }
 
 // MARK: - Type erasure

Sources/ButtonKit/Style/Button+ThrowableStyle.swift

@@ -85,19 +85,8 @@ extension ThrowableButtonStyle where Self == ShakeThrowableButtonStyle {
     }
 }
 
-struct ThrowableButtonStyleKey: EnvironmentKey {
-    static let defaultValue: AnyThrowableButtonStyle = AnyThrowableButtonStyle(.auto)
-}
-
 extension EnvironmentValues {
-    var throwableButtonStyle: AnyThrowableButtonStyle {
-        get {
-            return self[ThrowableButtonStyleKey.self]
-        }
-        set {
-            self[ThrowableButtonStyleKey.self] = newValue
-        }
-    }
+    @Entry var throwableButtonStyle: AnyThrowableButtonStyle = .init(.auto)
 }
 
 // MARK: - Type erasure

Sources/ButtonKit/Trigger/Trigger+Environment.swift

@@ -57,12 +57,6 @@ public final class TriggerButton: Sendable {
     }
 }
 
-private struct TriggerEnvironmentKey: EnvironmentKey {
-    static let defaultValue = TriggerButton()
-}
-
-extension EnvironmentValues {
-    public var triggerButton: TriggerButton {
-        self[TriggerEnvironmentKey.self]
-    }
+public extension EnvironmentValues {
+    @Entry var triggerButton: TriggerButton = .init()
 }