feat: Cleaning up shared models.

Sources/Styleguide/Pickers/CaseIterablePicker.swift

@@ -0,0 +1,40 @@
+import SwiftUI
+
+public struct CaseIterablePicker<Label, Content>: View 
+where Content: CaseIterable,
+      Content: CustomStringConvertible,
+      Content: Hashable,
+      Content: Identifiable,
+      Content.AllCases: RandomAccessCollection,
+      Label: View
+{
+
+  let label: () -> Label
+  @Binding<Content> var selection: Content
+
+  public init(
+    selection: Binding<Content>,
+    @ViewBuilder label: @escaping () -> Label
+  ) {
+    self.label = label
+    self._selection = selection
+  }
+
+  public var body: some View {
+    Picker(selection: $selection, label: label()) {
+      ForEach(Content.allCases) {
+        Text($0.description)
+          .tag($0)
+      }
+    }
+  }
+}
+
+extension CaseIterablePicker where Label == Text {
+
+  public init<S: StringProtocol>(_ title: S, selection: Binding<Content>) {
+    self.init(selection: selection) {
+      Text(title)
+    }
+  }
+}