Refresh ESC Docs

[jkodroff]

Refresh the entirety of the ESC docs with the following goals:

• Make the section roughly matches the IA found elsewhere, reorganizing content where needed
• Make sure the docs are in accordance with the style guide
• Make sure the information is accurate and complete
• Add any key missing topics
• Comparison pages should roughly mirror IaC comparison pages in terms of completeness and a neutral, docs-appropriate tone

[jkodroff]

IA proposal moved to #19415.