cubicweb-nazcaui #3728805 Add Regexp normalizer [validation pending]

Add regexp normalizer from Nazca in possible normalization

prioritynormal
typebug
done in0.2.0
load0.100
load left0.000
closed by#d6209b54ac1d [normalization] Add Regexp normalization, closes #3728805
patch[normalization] Add Regexp normalization, closes #3728805 [applied]