Replace google search with neeva search

[trichling]

Neeva is an ad free search engine having AI based search already. It does not collect / make money out of your serach history and presonal data. It shows search results for you, not for advertisers. I changed myn version of PoShFuck to use Neeva over Google. If you think like me that search should be focused on the user not on the interests of advertisers and tech companies, I prepared this PR to change the behaviour to use neeva.