Import .glb model file with animation

- improve movement controls
- TODO: allow more than one model, instance, and animation

src/game.h

@@ -5,6 +5,7 @@
 #include "cglm/cglm.h"
 #include "camera.h"
 #include "shape.h"
+#include "model.h"
 
 typedef struct
 {
@@ -24,9 +25,11 @@ typedef struct
 	SDL_GLContext *glContext;
 	GLuint textureId;
 	int shaderProgramId;
+	int modelShaderProgramId;
 	Camera camera;
 	Shape **shapes;
 	int numShapes;
+	Model testModel;
 	mat4 projMatrix;
 	mat4 viewMatrix;
 } GameState;