false positives on q search

[pvgenuchten]

according to opengeospatial/ogcapi-records#295 q is not a queryable, but a parameter with specific behaviour, the issue states that change climate should not match climate change, pycsw currently does not enforce this order of terms

https://demo.pycsw.org/cite/collections/metadata:main/items?q=lacus+justo

instead of q, pycsw could introduce another parameter, for example 'any', for full text search-style queries