feat: Add video player

lib/pages/views/video_viewer_view.dart

@@ -0,0 +1,51 @@
+import '../video_viewer.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_gen/gen_l10n/l10n.dart';
+import 'package:chewie/chewie.dart';
+
+class VideoViewerView extends StatelessWidget {
+  final VideoViewerController controller;
+
+  const VideoViewerView(this.controller, {Key key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: Colors.black,
+      extendBodyBehindAppBar: true,
+      appBar: AppBar(
+        elevation: 0,
+        leading: IconButton(
+          icon: Icon(Icons.close),
+          onPressed: Navigator.of(context).pop,
+          color: Colors.white,
+          tooltip: L10n.of(context).close,
+        ),
+        backgroundColor: Color(0x44000000),
+        actions: [
+          IconButton(
+            icon: Icon(Icons.reply_outlined),
+            onPressed: controller.forwardAction,
+            color: Colors.white,
+            tooltip: L10n.of(context).share,
+          ),
+          IconButton(
+            icon: Icon(Icons.download_outlined),
+            onPressed: controller.saveFileAction,
+            color: Colors.white,
+            tooltip: L10n.of(context).downloadFile,
+          ),
+        ],
+      ),
+      body: Center(
+        child: controller.error != null
+            ? Text(controller.error.toString())
+            : (controller.chewieController == null
+                ? CircularProgressIndicator(strokeWidth: 2)
+                : Chewie(
+                    controller: controller.chewieController,
+                  )),
+      ),
+    );
+  }
+}