Support repeated capture groups about kaleidoscope

[propensive]

Capture groups with "range" multiplicity need a bit more effort: in order to match them reliably, they need to be transformed into some number of fixed capture groups plus a repeated capture group by rewriting the regular expression. This will then require careful counting of the capture groups that have been repeated, since their numbering will have changed.

[propensive]

I think this problem is easier than I previously thought. Firstly, we should give each capturing group we wish to capture a name (e.g. r1, r2, rn, etc) of the for (?<rn>X). But we should also rewrite repeated capturing groups (those followed by *, +, {n} etc) to be inside an additional set of parentheses, i.e.

f(o.)*bar would be rewritten, f(?<rn>(o.)*)bar. We should then construct and compile the pattern from inside the original parentheses, i.e. o.. We can attempt to match this repeatedly on the match extracted from the outer parentheses to get a list of strings.