Follow-up to #1694 and #1727

• Ensure docs are in sync re: experimentalResolver flag name

  • docs link to a GH issue; update that issue

• Ensure new resolver features work when rogue tools install require.extensions for cjs/mjs/cts/mts

  • vanilla node does not have this. But nyc might add them
  • in these cases, we need to detect and wrap those hooks so that we continue to transform code

• Make experimentalSpecifierResolution a public option

  • remove @internal
  • add meaningful JSDoc
  • add to options.md on website

• Make moduleTypes page link to https://www.typescriptlang.org/docs/handbook/esm-node.html

• Make .jsx resolve to .tsx

  • TS will compile tsx into jsx with jsx: preserve I'd just as soon support this so that people don't complain when doing arcane stuff