Command queue api includes unnessary headers

[JCash]

In command_queue.hpp, neither viewmodel_runtime.hpp nor file_asset_loader.hpp are used.

#include "rive/object_stream.hpp"
#include "rive/refcnt.hpp"
#include "rive/math/vec2d.hpp"
#include "rive/viewmodel/runtime/viewmodel_runtime.hpp"
...

#include "file_asset_loader.hpp"

By having them there, it requires an api to include lots more files, and manually trying to do so is hard.
The end result is that all headers will be copied.

It does seem that command_queue.hpp should include rive/data_bind/data_values/data_type.hpp though.

[JCash]

Sorry to ping you @ErikUggeldahl but it's related to building the rive runtime as an actual api.
Ideally, there should be a folder with public headers, but currently, we have to copy all headers, since they're entangled.