Yattee v2 rewrite

Yattee/Views/Navigation/SidebarAdaptableModifier.swift

@@ -0,0 +1,25 @@
+//
+//  SidebarAdaptableModifier.swift
+//  Yattee
+//
+//  Navigation-related view modifiers.
+//
+
+import SwiftUI
+
+// MARK: - Sidebar Adaptable Modifier
+
+#if os(iOS)
+struct SidebarAdaptableModifier: ViewModifier {
+    func body(content: Content) -> some View {
+        content.tabViewStyle(.sidebarAdaptable)
+    }
+}
+
+extension View {
+    /// Applies sidebar adaptable style.
+    func sidebarAdaptable() -> some View {
+        modifier(SidebarAdaptableModifier())
+    }
+}
+#endif