README: Add LimboAI logo

Also, rename LICENSE

LOGO_LICENSE.md

@@ -0,0 +1,5 @@
+LimboAI Logo
+Copyright (c) 2023 Aleksandra Snitsaruk
+
+This work is licensed under the Creative Commons Attribution 4.0 International
+license (CC BY 4.0 International): https://creativecommons.org/licenses/by/4.0/

README.md

@@ -1,6 +1,10 @@
-LimboAI - Behavior Trees and State Machines for Godot 4
----
-LimboAI is a C++ module for Godot Engine 4 that provides an implementation of Behavior Trees and State Machines, which can be used together to create complex AI behaviors.
+# LimboAI - Behavior Trees and State Machines for Godot 4
+
+<p align="center">
+  <img src="doc/images/logo.svg" width="400" alt="LimboAI logo">
+</p>
+
+**LimboAI** is a C++ module for **Godot Engine 4** that provides an implementation of Behavior Trees and State Machines, which can be used together to create complex AI behaviors.
 
 >**🛈 Supported Godot Engine: 4.2**