Engine Render multiple Objects at the same time

[ciaala]

While developing the task ciaala/vulkan_engine_cpp#7 (ciaala/vulkan_engine_cpp#6) I discovered that the renderer is still hardcoded to Render the Cube object.
This task goal is to break apart the engine and the Cube-Only data.
One acceptance criteria would be to render 2 different cube each turning in the opposite direction and with different texture.