docs: Consolidate install instructions in README (#3065)
* docs: consolidate install instructions in README and link from guides
* docs: build docs from staged directory to rewrite README links
* Fix html markdown link mismatch
* clean up verbose comments
* Update llms.txt
* Add md_in_html to fix file path divergence
* regenerate llms.txt
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Co-authored-by: Mark Phelps <209477+markphelps@users.noreply.github.com>
