Add support for cards

Sources/Core/View/Card.swift

@@ -0,0 +1,56 @@
+//
+//  Card.swift
+//  MacBackend
+//
+//  Created by david-swift on 05.01.2025.
+//
+
+import SwiftUI
+
+/// The card wrapper.
+public struct Card: SwiftUIWidget {
+
+    /// The wrapped view.
+    var content: Body
+
+    /// The wrapped views.
+    public var wrappedViews: [String: Meta.AnyView] {
+        [.mainContent: content]
+    }
+
+    /// Initialize a card view.
+    /// - Parameter content: The card's content.
+    public init(@Meta.ViewBuilder content: () -> Body) {
+        self.content = content()
+    }
+
+    /// Get the SwiftUI view.
+    /// - Parameter properties: The widget data.
+    /// - Returns: The SwiftUI view.
+    public static func view(properties: Self) -> some SwiftUI.View {
+        CardView()
+    }
+
+}
+
+/// The card view in SwiftUI.
+struct CardView: SwiftUI.View {
+
+    /// The color scheme.
+    @SwiftUI.Environment(\.colorScheme)
+    var colorScheme
+
+    /// The view's body.
+    var body: some SwiftUI.View {
+        MacBackendView(.mainContent)
+            .padding(20)
+            .background(
+                Color(
+                    colorScheme == .dark ? NSColor.darkGray : NSColor.white
+                ),
+                in: .rect(cornerRadius: 10)
+            )
+            .shadow(color: .black.opacity(0.2), radius: 25)
+    }
+
+}

Sources/MacBackend/AnyView.swift

@@ -104,4 +104,10 @@ extension AnyView {
         }
     }
 
+    /// Make the view a card.
+    /// - Returns: The view.
+    public func card() -> AnyView {
+        Card { self }
+    }
+
 }