Replace demo root with component catalog

Author: colemancda

Demo/App.swiftpm/Sources/Catalog.swift

@@ -0,0 +1,49 @@
+#if canImport(AndroidSwiftUI)
+import AndroidSwiftUI
+#else
+import SwiftUI
+#endif
+
+/// A component catalog: one playground per supported SwiftUI feature, navigated
+/// with a `NavigationStack` and a lazy `List`.
+struct ContentView: View {
+
+    var body: some View {
+        NavigationStack {
+            List(CatalogEntry.all) { entry in
+                NavigationLink(entry.title, destination: entry.screen)
+            }
+            .navigationTitle("Catalog")
+        }
+    }
+}
+
+struct CatalogEntry: Identifiable {
+    let id: String
+    let title: String
+    let screen: AnyCatalogScreen
+
+    static let all: [CatalogEntry] = [
+        CatalogEntry(id: "text", title: "Text", screen: AnyCatalogScreen(TextPlayground())),
+        CatalogEntry(id: "button", title: "Button", screen: AnyCatalogScreen(ButtonPlayground())),
+        CatalogEntry(id: "toggle", title: "Toggle", screen: AnyCatalogScreen(TogglePlayground())),
+        CatalogEntry(id: "slider", title: "Slider", screen: AnyCatalogScreen(SliderPlayground())),
+        CatalogEntry(id: "textfield", title: "TextField", screen: AnyCatalogScreen(TextFieldPlayground())),
+        CatalogEntry(id: "picker", title: "Picker", screen: AnyCatalogScreen(PickerPlayground())),
+        CatalogEntry(id: "progress", title: "ProgressView", screen: AnyCatalogScreen(ProgressViewPlayground())),
+        CatalogEntry(id: "stack", title: "Stacks", screen: AnyCatalogScreen(StackPlayground())),
+        CatalogEntry(id: "spacer", title: "Spacer & Divider", screen: AnyCatalogScreen(SpacerDividerPlayground())),
+        CatalogEntry(id: "color", title: "Color", screen: AnyCatalogScreen(ColorPlayground())),
+        CatalogEntry(id: "scroll", title: "ScrollView", screen: AnyCatalogScreen(ScrollViewPlayground())),
+        CatalogEntry(id: "list", title: "List", screen: AnyCatalogScreen(ListPlayground())),
+        CatalogEntry(id: "grid", title: "Grid", screen: AnyCatalogScreen(GridPlayground())),
+        CatalogEntry(id: "modifier", title: "Modifiers", screen: AnyCatalogScreen(ModifierPlayground())),
+        CatalogEntry(id: "navigation", title: "Navigation", screen: AnyCatalogScreen(NavigationPlayground())),
+        CatalogEntry(id: "tab", title: "TabView", screen: AnyCatalogScreen(TabViewPlayground())),
+        CatalogEntry(id: "sheet", title: "Sheet", screen: AnyCatalogScreen(SheetPlayground())),
+        CatalogEntry(id: "alert", title: "Alert", screen: AnyCatalogScreen(AlertPlayground())),
+        CatalogEntry(id: "state", title: "State", screen: AnyCatalogScreen(StatePlayground())),
+        CatalogEntry(id: "environment", title: "Environment", screen: AnyCatalogScreen(EnvironmentPlayground())),
+        CatalogEntry(id: "observable", title: "Observable", screen: AnyCatalogScreen(ObservablePlayground())),
+    ]
+}