GH-421 Add Godot compatibility to README.md

Author: Naros

README.md

@@ -1,6 +1,6 @@
 ![screen-shot](https://cdn.vahera.cloud/utG8NiO3oN8sfXvI2ZZ0zg/20bdd53e-9a27-4326-1b11-65fe443e0400/public)
 
-![Godot v4.2](https://img.shields.io/badge/Godot-v4.2-%23478cbf?logo=godot-engine&logoColor=white&style=flat-square)
+![Godot v4.3](https://img.shields.io/badge/Godot-v4.3-%23478cbf?logo=godot-engine&logoColor=white&style=flat-square)
 ![GitHub release (latest by date)](https://img.shields.io/github/v/release/Vahera/godot-orchestrator?&style=flat-square)
 [![LICENSE](https://img.shields.io/badge/license-Apache--2.0-blue?logo=apache)](https://github.com/Vahera/godot-orchestrator/blob/main/LICENSE)
 
@@ -22,6 +22,17 @@ The following screenshots only scratch the surface of what the plug-in offers ou
 
 ![screen-shot](https://cdn.vahera.cloud/utG8NiO3oN8sfXvI2ZZ0zg/b5ca95e3-1a3c-4376-dacb-df463ef3fa00/public)
 
+## Godot Compatibility
+
+Orchestrator is made using Godot GDExtension technology, which has certain ABI (application binary interface) requirements that must be followed to guarantee that the integration between extensions and the engine work as expected.
+The following table describes which Orchestrator version you should use based on your Godot editor version.
+
+Using the wrong version of Orchestrator with the Godot editor may result in unexpected behavior or crashes.
+
+| Godot 4.3+              | Godot 4.2             |
+|-------------------------|-----------------------|
+| v2.1.x+ (`main` branch) | v2.0.x (`2.0` branch) |
+
 ## 🚀 Features
 
 * A complete visual scripting solution for Godot.