Rename ToolbarIcon to HeroIcon for clarity

The "ToolbarIcon" name was misleading - it's used in the macOS container
app's ContentView, not the actual Safari toolbar. The Safari extension
toolbar icons are in Resources/images/ (icon-*.png files). Renamed to
"HeroIcon" to accurately reflect its purpose as the hero image in the
container app UI.

Author: bartTC

…ssets/ToolbarIcon.imageset/Contents.json …xcassets/HeroIcon.imageset/Contents.jsonCF Cache Status/CF Cache Status/Assets.xcassets/ToolbarIcon.imageset/Contents.json renamed to CF Cache Status/CF Cache Status/Assets.xcassets/HeroIcon.imageset/Contents.json CF Cache Status/CF Cache Status/Assets.xcassets/ToolbarIcon.imageset/Contents.json renamed to CF Cache Status/CF Cache Status/Assets.xcassets/HeroIcon.imageset/Contents.json

@@ -24,7 +24,7 @@ struct ContentView: View {
 
     var body: some View {
         VStack(spacing: 20) {
-            Image("ToolbarIcon")
+            Image("HeroIcon")
                 .resizable()
                 .aspectRatio(contentMode: .fit)
                 .frame(width: 72, height: 72)