* first pass at the single gpu doc
* overview: improved clarity and navigation
* WIP
* updated intro and deepspeed sections
* improved torch.compile section
* more improvements
* minor improvements
* make style
* Apply suggestions from code review
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>
* feedback addressed
* mdx -> md
* link fix
* feedback addressed
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Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>
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