add project logo

README.md

@@ -6,6 +6,8 @@
 
 FFmpeg plugin for Flutter. Supports iOS and Android.
 
+<img src="https://github.com/tanersener/flutter-ffmpeg/blob/development/docs/assets/flutter-ffmpeg-logo-v2.png" width="240">
+
 ### 1. Features
 - Based on MobileFFmpeg
 - Supports