SwiftUI: add placeholder for Label.

This adds the `Label` interface as a placeholder for the type.

Author: compnerd

Sources/SwiftWin32UI/Views and Controls/Label.swift

@@ -0,0 +1,19 @@
+// Copyright © 2022 Saleem Abdulrasool <compnerd@compnerd.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+import SwiftWin32
+
+public struct Label<Title: View, Icon: View> {
+}
+
+extension Label: View {
+  public typealias Body = SwiftWin32.Label
+
+  public var body: SwiftWin32.Label {
+    return SwiftWin32.Label(frame: .zero)
+  }
+}
+
+extension SwiftWin32.Label: View {
+  public typealias Body = Never
+}