Add accelerator setup guides (#5827)
This document provide a places to hold accelerator setup guides. It is
intend to be a single place to lookup installation guides for different
accelerators. Currently CPU and XPU setup guides are added to this
document and could be extended to other accelerators.
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Co-authored-by: Liangliang Ma <1906710196@qq.com>
Co-authored-by: Olatunji Ruwase <olruwase@microsoft.com>
Co-authored-by: Logan Adams <114770087+loadams@users.noreply.github.com>
