[FEA] Method to return starting index of regex match

[JamesMaki]

Is your feature request related to a problem? Please describe.
Porting PCRE and Hyperscan regex patterns to NVIDIA Morpheus, existing solution uses functions from those frameworks that accept a regex pattern and return the starting index of the first match.

Describe the solution you'd like
Would it be possible to add regex pattern support to the existing .str.find implementation, or expose a flag on .str.match that enables returning the start index?

Describe alternatives you've considered
PCRE and Hyperscan regex engines

[JamesMaki]

@beckernick