chore(branding): add multi-platform app icons and source assets

Wire Android adaptive/webp launchers, iOS AppIcon, and desktop package
icons (macOS icns, Windows ico, Linux png) from a shared assets/ tree.

iosApp/iosApp/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,36 +1,36 @@
 {
-	"images": [
-		{
-			"filename": "app-icon-1024.png",
-			"idiom": "universal",
-			"platform": "ios",
-			"size": "1024x1024"
-		},
-		{
-			"appearances": [
-				{
-					"appearance": "luminosity",
-					"value": "dark"
-				}
-			],
-			"idiom": "universal",
-			"platform": "ios",
-			"size": "1024x1024"
-		},
-		{
-			"appearances": [
-				{
-					"appearance": "luminosity",
-					"value": "tinted"
-				}
-			],
-			"idiom": "universal",
-			"platform": "ios",
-			"size": "1024x1024"
-		}
-	],
-	"info": {
-		"author": "xcode",
-		"version": 1
-	}
+  "images" : [
+    {
+      "filename" : "app-icon.png",
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "tinted"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
 }

iosApp/iosApp/Assets.xcassets/Contents.json

@@ -1,6 +1,6 @@
 {
-	"info": {
-		"author": "xcode",
-		"version": 1
-	}
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
 }