Change 27482
README.md updates:
* Added Documentation References section, with less clutter and easier links to PDF/HTML versions of key docs, including the upgrade guide.
* Enhanced "Sophistication Simplified" section.
* Simplified Support status text.
* General grammer corrections.
* Removed a broken link.
* Simpflified Contribing sections.
* Enhanced formatting/TOC levels, moved several sections under new "Features and Benefits" section.
#review-27483
* Added Documentation References section, with less clutter and easier links to PDF/HTML versions of key docs, including the upgrade guide.
* Enhanced "Sophistication Simplified" section.
* Simplified Support status text.
* General grammer corrections.
* Removed a broken link.
* Simpflified Contribing sections.
* Enhanced formatting/TOC levels, moved several sections under new "Features and Benefits" section.
#review-27483