feat: move all json and validate to new utils

crates/delta/src/routes/users/block_user.rs

@@ -2,7 +2,7 @@ use revolt_database::util::reference::Reference;
 use revolt_database::{Database, User};
 use revolt_models::v0;
 use revolt_result::Result;
-use rocket::serde::json::Json;
+use crate::util::json::Json;
 use rocket::State;
 
 /// # Block User