Add appearance playground

Author: colemancda

Demo/App.swiftpm/Sources/AppearancePlaygrounds.swift

@@ -0,0 +1,50 @@
+#if canImport(AndroidSwiftUI)
+import AndroidSwiftUI
+#else
+import SwiftUI
+#endif
+
+struct AppearancePlayground: View {
+    var body: some View {
+        ScrollView {
+            VStack(alignment: .leading, spacing: 0) {
+                Example("Border") {
+                    Text("Bordered")
+                        .padding()
+                        .border(.blue, width: 2)
+                }
+                Example("Shadow") {
+                    RoundedRectangle(cornerRadius: 12)
+                        .fill(.white)
+                        .frame(width: 140, height: 64)
+                        .shadow(radius: 10)
+                }
+                Example("Clip to circle") {
+                    Color.blue.frame(width: 80, height: 80).clipShape(Circle())
+                }
+                Example("Clip to capsule") {
+                    Text("Capsule")
+                        .padding()
+                        .background(Color.orange)
+                        .clipShape(Capsule())
+                }
+                Example("Overlay badge") {
+                    Color.blue
+                        .frame(width: 80, height: 80)
+                        .cornerRadius(12)
+                        .overlay(alignment: .bottomTrailing) {
+                            Circle().fill(.red).frame(width: 26, height: 26)
+                        }
+                }
+                Example("Overlay text") {
+                    Color.green
+                        .frame(height: 80)
+                        .cornerRadius(8)
+                        .overlay {
+                            Text("Centered overlay").foregroundColor(.white).bold()
+                        }
+                }
+            }
+        }
+    }
+}