* [enh] engines: rework bing engine
Only Bing-Web has been reworked.
Some features now require JavaScript (paging and time-range results).
Cookies no longer work, parameters such as `cc`, `ui`, ... alter the results.
The engine only appears to use the locale from `Accept-Language` header properly.
The rest of Bing's child engines (Bing-Image, Bing-Video, ...) seem to benefit
from using `mkt` param in conjunction with the `Accept-Language` header
override, although Bing-Web does not (?)
* [enh] explicit mkt
* [fix] engines: bing_videos.py
https://github.com/searxng/searxng/pull/5793#pullrequestreview-3881883250
6521190bb4