[enh] Add Tineye reverse image search (#3040)

* [enh] Add Tineye reverse image search 

Other optional parametesr:

"&sort=crawl_date" can be appended to search_string to sort results by date.
"&domain=example.org" can be implemented to search_string to get results from just one domain.

Public instances could get relatively fast timed-out for 3600s.

* [enh] Add TIneye to settings.yml 

Check if that's the right shortcut.

* [mod] Fix checks

* [mod] Try to fix checks

* [mod] Use Four spaces for indentation

And set paging back to True

Co-authored-by: Noémi Ványi <kvch@users.noreply.github.com>