Implement coverage for Housing endpoints

hypixel-api-core/src/main/java/net/hypixel/api/HypixelAPI.java

@@ -287,6 +287,14 @@ public CompletableFuture<SkyBlockFireSalesReply> getSkyBlockFireSales() {
         return get(false, SkyBlockFireSalesReply.class, "skyblock/firesales");
     }
 
+    // TODO: Add support for array responses so that the other endpoints can become implementable
+    public CompletableFuture<HouseReply> getHouseById(String id) {
+        return get(true, HouseReply.class, "housing/house",
+                HTTPQueryParams.create()
+                        .add("house", id)
+        );
+    }
+
     /**
      * Applies a {@code filter} to a player object when it is received in an API response.
      */

hypixel-api-core/src/main/java/net/hypixel/api/reply/HouseReply.java

@@ -0,0 +1,82 @@
+package net.hypixel.api.reply;
+
+import com.google.gson.annotations.SerializedName;
+
+import java.time.ZonedDateTime;
+
+public class HouseReply extends RateLimitedReply {
+    private House house;
+
+    public House getHouse() { return house; }
+
+    @Override
+    public String toString() {
+        return "HouseReply{" +
+                "house=" + house +
+                "}" + super.toString();
+    }
+
+    public static class House {
+        @SerializedName("uuid") // Note: This value isn't valid UUID v4 because it has no dashes.
+        private String id;
+        @SerializedName("owner")
+        private String ownerId;
+        @SerializedName("players")
+        private Short onlinePlayers;
+
+        // Note: Houses made before full release will show as being made 1st Jan. 1970
+        private ZonedDateTime createdAt;
+        private HouseCookies cookies;
+
+        /**
+         * The house's unique identifier, a 32-character hexadecimal string not to be confused with a UUID.
+         * If the house was made during Housing's beta period, it will match the owner's Minecraft ID.
+         *
+         * @return the house's unique identifier
+         */
+        public String getId() { return id; }
+
+        /**
+         * The house owner's Minecraft ID.
+         *
+         * @return the house owner's Minecraft ID
+         */
+        public String getOwnerId() { return ownerId; }
+
+        /**
+         * The time of the house's creation, falling back to the 1st of January 1970 if
+         * the house was made during Housing's beta period (Aug. 2015 - Mar. 2020).
+         *
+         * @return the house's time of creation
+         */
+        public ZonedDateTime getCreatedAt() { return createdAt; }
+
+        /**
+         * The house's current online player count.
+         *
+         * @return the house's live player count
+         */
+        public Short getOnlinePlayers() { return onlinePlayers; }
+
+        /**
+         * The house's metrics relating to the cookies it received from players.
+         * This currently only contains the amount for the current week.
+         *
+         * @return the house's cookie metrics
+         */
+        public HouseCookies getCookies() { return cookies; }
+
+
+        public static class HouseCookies {
+            private Integer current;
+
+            /**
+             * The house's amount of received cookies for the current week, each
+             * starting on Sunday, 00:00 Toronto Local Time.
+             *
+             * @return the amount of cookies this house has received this week
+             */
+            public Integer getCurrent() { return current; }
+        }
+    }
+}