Make character run

- new, less blocky character model with a run animation
- remove .obj support in favor of .glb/.gltf
- character faces camera direction and turns head
- press Tab to rotate camera freely around the character

src/game.h

@@ -16,6 +16,7 @@ typedef struct
 	bool d;
 	bool q;
 	bool e;
+	bool freeLook;
 } InputState;
 
 typedef struct