Add RegexMatch and RegexReplace steps

• Create a RegexMatch step that takes a string and a regex and returns a bool

• RegexMatch 'Hello' '\w+' returns true

• Create a RegexReplace step that takes a string and a regex and returns a string

• RegexMatch 'Hello' '\w' (stringconcat [<value>, ' '] ) returns H e l l o

Changelog Summary

• Added RegexMatch Step
• Added RegexReplace Step