* Fix: one-var autofixing for export (fixes #13834)

* Chore: added export placement for adjacent tokens

* New: `no-unsafe-optional-chaining` rule (fixes #13431)

* add checking 'in'

* fix type & add example

* add check

* add examples

* make it handle logical expression

* fix logical error

* fix typo

* fix typo

* fix tests format and false positive

* fix review

- add test cases (*=, /=)
- improve Rule Details doc
- fix wrong example
- add unary, assignment operation test cases
- edit test cases - move optional chain to right side
- change to use Set
- fix jsdoc typo and type
- add examples on docs
- handle conditional, sequence expressions
- remove useless check
- fix doc
- add test cases
- fix typo

* fix title

* edit description

* fix docs

* fix review

- add test cases
- fix docs

* add example

* add example

* handle await

* add test cases, fix docs

* fix test cases, docs