Add CI step for compiling and testing godot-cpp

misc/scripts/compare_extension_api.py

@@ -0,0 +1,11 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import sys
+
+# TODO:
+# Add a process that compares the original godot-cpp/godot-headers/extension_api.json with the new extension_api.json (both passed as arguments) and reports any API calls that have been removed.
+# If we only have additions or no changes to the file, we pass
+# For now we deem this too early because the API isn't stable enough yet.
+
+sys.exit(0)