Add video player (#2)

https://github.com/sony/flutter-embedded-linux/issues/124

packages/video_player/pubspec.yaml

@@ -0,0 +1,20 @@
+name: video_player_elinux
+description: Flutter plugin for displaying inline video with other Flutter widgets on Embedded Linux.
+version: 0.9.0
+homepage: https://github.com/sony/flutter-elinux-plugins
+repository: https://github.com/sony/flutter-elinux-plugins/tree/main/packages/video_player/video_player
+
+environment:
+  sdk: ">=2.12.0 <3.0.0"
+  flutter: ">=1.20.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+  video_player_platform_interface: ^4.1.0
+
+flutter:
+  plugin:
+    platforms:
+      elinux:
+        pluginClass: VideoPlayerElinuxPlugin