Add sheet view page

lib/sheetview.dart

@@ -0,0 +1,23 @@
+import 'package:flutter/material.dart';
+import 'package:sheetless/sheet.dart';
+
+class SheetViewerPage extends StatefulWidget {
+  final Sheet sheet;
+
+  const SheetViewerPage({super.key, required this.sheet});
+
+  @override
+  State<SheetViewerPage> createState() => _SheetViewerPageState();
+}
+
+class _SheetViewerPageState extends State<SheetViewerPage> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.sheet.name),
+      ),
+      body: Center(child: Text(widget.sheet.author)),
+    );
+  }
+}