refactor typedefs in src/language-js/print/ternary.js

[brodybits]

• move the JSDoc typedefs to the beginning of src/language-js/print/ternary.js
• add & use JSDoc typedef for @param {FastPath} path, which effectively reverts the change in PR Refactor: Use FastPath type def in JSDoc type comments #8740
• keep JSDoc typedef for @typedef {Object} OperatorOptions in its own comment block

I think these changes should improve the readability.

• I’ve added tests to confirm my change works.
• (If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory)
• (If the change is user-facing) I’ve added my changes to changelog_unreleased/*/pr-XXXX.md file following changelog_unreleased/TEMPLATE.md.
• I’ve read the contributing guidelines.

✨Try the playground for this PR✨

[brodybits]

I set this back to draft status. When I tried yarn lint:typecheck with type checking of this file enabled intsconfig.json, it gave me the following error:

src/language-js/print/ternary.js:131:12 - error TS2304: Cannot find name 'Options'.

131  * @param {Options} options - Prettier options

I would really rather resolve this error, and the type errors in the modules it depends on, before continuing with this proposal.

I hope to have some more progress in the near future. My apologies for the bother.

[brodybits]

Closing in favor of the changes in PR #8759