docs: add screenshot

Author: Nodonisko

README.md

@@ -1,5 +1,9 @@
 # React Native Performance Toolkit
 
+<table>
+<tr>
+<td width="65%" valign="top">
+
 Low overhead monitoring of important performance metrics for React Native apps like JS FPS, UI FPS, CPU usage, and memory usage.
 
 ## Installation
@@ -13,6 +17,13 @@ bun add react-native-performance-toolkit react-native-nitro-modules
 - React Native v0.76.0 or higher
 - Reanimated v4 or higher
 
+</td>
+<td width="35%">
+<img src="media/app_screenshot.png" alt="Performance Toolkit Demo" width="100%" />
+</td>
+</tr>
+</table>
+
 ## Usage
 
 ### Very simple usage - get value once

media/app_screenshot.png

@@ -39,7 +39,8 @@
     "app.plugin.js",
     "*.podspec",
     "README.md",
-    "!example"
+    "!example",
+    "!media"
   ],
   "workspaces": [
     "example"