Add smartxBidAdapter (#5275)

* Add smartclipBidAdapter

* Updated imported files

* .js file

* Beautify code

* Revert "Beautify code"

This reverts commit da2aea7.

* testing

* partial tab fix

* syntax fixes

* further syntax fixes

* Trailing spaces...

* const parameters fpr smartInTxt Functions

* const to var

* // eslint-disable-next-line camelcase

* new commit

* Update Targeting

* Update syntax

* beautify code

* remove trailing spaces

* Update smartclipBidAdapter.md

* Update smartclipBidAdapter.js

* Update smartclipBidAdapter.js

* rename files

* added first unit tests, further adjustments

* adjusted queries, ran gulp lint, etc

* adjustments, further tests

* extendet unit tests

* naming for spec

* adjusted bidfloor and bidfloorcur, removed old queries, adjustments in the markdown with more use cases

* added more use cases within md file

* layout fix

* md layout

* smartxBidAdapter.js - triple equals, removed context2 due to not used in params.ad_units. Adjusted query.
smartxBidAdapter_spec.js - fixed typo

Co-authored-by: smartclip AdTechnology <adtech@smartclip.com>
Co-authored-by: Gino Cirlini <skylinar@web.de>