feat: add icon

ui/browser_item.slint

@@ -17,6 +17,12 @@ export component BrowserItem {
             height: 80px;
             padding: 8px;
             alignment: space-between;
+            Image {
+                height: 48px;
+                width: 48px;
+                source: @image-url("../logos/firefox_48x48.png");
+            }
+
             Text {
                 text: browser.path;
                 vertical_alignment: center;

ui/types.slint

@@ -1,6 +1,7 @@
 
 @rust-attr(derive(serde::Serialize, serde::Deserialize))
 export struct BrowserConfig  {
+    icon: string,
     path: string,
     flags: string,
 }