add godot to readme and ci

Author: anokta

.github/workflows/ci.yml

@@ -57,7 +57,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: build
-        run: python build.py --examples --test --unity
+        run: python build.py --examples --godot --unity --test
 
   unity:
     name: unity on ${{ matrix.os }}

README.md

@@ -8,8 +8,9 @@ barelymusician is a real-time music engine for interactive systems.
 It provides a modern C/C++ API to generate and perform musical sounds from scratch with sample
 accurate timing.
 
-This repository includes build targets for Windows, macOS, Linux, Android, WebAssembly, and Daisy
-platforms, along with a native Unity game engine plugin and a VST instrument plugin.
+[godot]: ## "WIP"
+This repository includes build targets for Windows, macOS, Linux, Android, WebAssembly, and Daisy,
+as well as a Godot GDExtension[*][godot], a native Unity plugin, and a VST instrument plugin.
 
 To use in a project, simply include [barelymusician.h](include/barelymusician.h).