Add basic functionality to draw instances

Allows creation of instances of meshes and drawing all of them with
single draw call. Instances can have their own transformation data
(location, rotation and scale).

graphics/CMakeLists.txt

@@ -51,6 +51,7 @@ target_sources(rse_graphics PRIVATE
     src/vulkan_buffers.cpp
     src/vulkan_descriptors.cpp
     src/rse_graphics.cpp
+    src/mesh_controller.cpp
 )
 
 target_link_libraries(rse_graphics PRIVATE