Add API to get/set inhabited time of a Chunk

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/CraftChunk.java

@@ -199,6 +199,18 @@ public class CraftChunk implements Chunk {
         return getWorld().getPluginChunkTickets(getX(), getZ());
     }
 
+    @Override
+    public long getInhabitedTime() {
+        return getHandle().q();
+    }
+
+    @Override
+    public void setInhabitedTime(long ticks) {
+        Preconditions.checkArgument(ticks >= 0, "ticks cannot be negative");
+
+        getHandle().b(ticks);
+    }
+
     @Override
     public ChunkSnapshot getChunkSnapshot() {
         return getChunkSnapshot(true, false, false);