make iced_wgpu::mesh::Indexed use Arc<[_]> instead of Vec<_>
#2703
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edwloef
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My use case for this is that I have a very large mesh that is very expensive to clone, whose vertices and indices never
change, that I would like to be able to move, scale and clip cheaply within a custom widget.
This should have negiligible performance impact, since
Arc::from<Vec<_>>doesn't clone theVec<_>, and only allocates four words for a ref counted slice.