Add more entity api (#7564)

patches/server/Turtle-API.patch

@@ -90,5 +90,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    public void setHasEgg(boolean hasEgg) {
 +        getHandle().setHasEgg(hasEgg);
 +    }
++
++    @Override
++    public boolean isLayingEgg() {
++        return this.getHandle().isLayingEgg();
++    }
 +    // Paper end
  }