feat: category / hashtag pages

- with links form stream info
closes #12

lib/widgets/game_info.dart

@@ -0,0 +1,25 @@
+import 'package:flutter/widgets.dart';
+import 'package:go_router/go_router.dart';
+import 'package:zap_stream_flutter/theme.dart';
+import 'package:zap_stream_flutter/utils.dart';
+import 'package:zap_stream_flutter/widgets/pill.dart';
+
+class GameInfoWidget extends StatelessWidget {
+  final GameInfo info;
+
+  const GameInfoWidget({super.key, required this.info});
+
+  @override
+  Widget build(BuildContext context) {
+    return PillWidget(
+      color: LAYER_2,
+      onTap: () {
+        context.push("/category/${Uri.encodeComponent(info.id)}", extra: info);
+      },
+      child: Text(
+        info.name,
+        style: TextStyle(color: PRIMARY_1, fontWeight: FontWeight.bold),
+      ),
+    );
+  }
+}