fix token rx_braced to a) use std alternative syntax (no empty alternative) and b) allow for capturing parens '(' and ')'
introduce scaling, remove duplication in RegexSimple.pm by using the grammar body itself for data
fix RxSimple.doWork for scales > @rules.elems; add Hooks_04 and Tracer_0x_h04.pm (method-cache enabled)
rename RegexSimple to RxSimple
add GrammarBenchmark.pm6
GrammarBenchmark: keep factory internal, rename worker / doWork -> runner / run
GrammarBenchmark: get workGrammar via &compile and store compile time*s*
GrammarBenchmark stores raw run times