[docs] Update lint rule reference docs
[docs] Update lint rule reference docs

Summary:
- Sorted rules alphabetically, in TOC and in document overall
- Added `deprecated-type` to the TOC
- Removed docs for long removed `deprecated-declare-exports` lint
- Updated the language of `deprecated-utility`, as they are really just aliases for `any` now
- Added docs for `ambiguous-object-type`
- Removed some other outdated language (e.g. about things "coming soon" or "in the works" that actually aren't)

Reviewed By: jbrown215

Differential Revision: D19242964

fbshipit-source-id: fd3a0c9f6887a5fe3ed37ecf37a907660531d7d0

nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow