opt get pgc follow status

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/grpc/view.dart

@@ -0,0 +1,18 @@
+import 'package:PiliPlus/grpc/bilibili/app/viewunite/v1.pb.dart'
+    show ViewReq, ViewReply;
+import 'package:PiliPlus/grpc/grpc_repo.dart';
+import 'package:PiliPlus/http/loading_state.dart';
+
+class ViewGrpc {
+  static Future<LoadingState<ViewReply>> view({
+    required String bvid,
+  }) {
+    return GrpcRepo.request(
+      GrpcUrl.view,
+      ViewReq(
+        bvid: bvid,
+      ),
+      ViewReply.fromBuffer,
+    );
+  }
+}