Update iconography visible in launch video (#1762)

ElementX/Sources/Other/Extensions/Label.swift

@@ -0,0 +1,54 @@
+//
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Compound
+import SwiftUI
+
+extension Label {
+    /// Creates a label using a local asset as a Compound icon and a title generated from a string.
+    /// The icon size will be 24pt, scaling relative to the `bodyLG` with Dynamic Type.
+    /// - Parameters:
+    ///   - title: A string used as the label’s title.
+    ///   - iconAsset: The asset to use as the custom Compound icon.
+    ///
+    /// The supplied asset should have a square frame or it may end up distorted.
+    init(_ title: some StringProtocol, iconAsset: ImageAsset) where Title == Text, Icon == CompoundIcon {
+        self.init {
+            Text(title)
+        } icon: {
+            CompoundIcon(customImage: iconAsset.swiftUIImage)
+        }
+    }
+    
+    /// Creates a label using a local asset as a Compound icon and a title generated from a string.
+    /// - Parameters:
+    ///   - title: A string used as the label’s title.
+    ///   - iconAsset: The asset to use as the custom Compound icon.
+    ///   - size: The size of the icon.
+    ///   - font: The font that the icon will scale relative to for Dynamic Type.
+    ///
+    /// The supplied asset should have a square frame or it may end up distorted.
+    init(_ title: some StringProtocol,
+         iconAsset: ImageAsset,
+         iconSize: CompoundIcon.Size,
+         relativeTo font: Font) where Title == Text, Icon == CompoundIcon {
+        self.init {
+            Text(title)
+        } icon: {
+            CompoundIcon(customImage: iconAsset.swiftUIImage, size: iconSize, relativeTo: font)
+        }
+    }
+}