Change how post are responded

[dadamu]

Feature description

In current version, the post response returns whole content includes all the PostReactions and UserAnswers. In my opinion, both of them in PostResponse could be replaced with the total count. As a result, the post response will be much smaller and much more fast when querying. Then, PostReactions can also be paginated when querying whole reactions of the post.

Implementation proposal

Change the post response struct, say:

message QueryPostResponse {
  desmos.posts.v1beta1.Post post = 1;

  // Answers field show the total count of each answers from user
  map<string, int> answers = 2;

  // Reactions field shows the total count of each reactions from user 
  map<string, int> reactions = 3;

  repeated string children = 4;
}

Thoughts on it? @RiccardoM @bragaz

[RiccardoM]

I think we can simply delete all the different things that are not the Post itself. Developers will be able to use the other gRPC queries to get the data anyway. So the final response can simply be

message QueryPostResponse {
  desmos.posts.v1beta1.Post post = 1;
}

Notes

If not already present, we should add the following queries: GetPostReactions (paginated) and GetPostChildren (paginated)