docs: sponsorship logo [skip ci]

README.md

@@ -3,6 +3,29 @@
 
 <br />
 
+<p align="center">
+  <strong>Sponsored with 💖 by</strong>
+  <br>
+  <a href="https://getstream.io/chat/sdk/flutter/?utm_source=alexmercerind_dart&utm_medium=Github_Repo_Content_Ad&utm_content=Developer&utm_campaign=alexmercerind_December2022_FlutterSDK_klmh22" target="_blank">
+    <picture>
+      <source media="(prefers-color-scheme: dark)" srcset="https://user-images.githubusercontent.com/28951144/204903234-4a64b63c-2fc2-4eef-be44-d287d27021e5.svg">
+      <source media="(prefers-color-scheme: light)" srcset="https://user-images.githubusercontent.com/28951144/204903022-bbaa49ca-74c2-4a8f-a05d-af8314bfd2cc.svg">
+      <img alt="Stream Chat" width="350" height="auto" src="https://user-images.githubusercontent.com/28951144/204903022-bbaa49ca-74c2-4a8f-a05d-af8314bfd2cc.svg">
+    </picture>
+  </a>
+  <br>
+    <h5 align="center">
+      Rapidly ship in-app messaging with Stream's highly reliable chat infrastructure and feature-rich SDKs, including Flutter!
+    </h5>
+  <h4 align="center">
+    <a href="https://getstream.io/chat/sdk/flutter/?utm_source=alexmercerind_dart&utm_medium=Github_Repo_Content_Ad&utm_content=Developer&utm_campaign=alexmercerind_December2022_FlutterSDK_klmh22" target="_blank">
+    Try the Flutter Chat tutorial
+    </a>
+  </h4>
+</p>
+
+<br />
+
 <img src='https://alexmercerind.github.io/img/dart_vlc/0.webp'></img>
 <img src='https://alexmercerind.github.io/img/dart_vlc/1.webp'></img>