Preserve contextual awareness on same capture + namedCapture group

[codpro2005]

Capture scope is not preserved throughout respective namedCapture & vice versa:

const res = typedRegExp('(?<name>)?').exec('')!;
if (res[1]) {
    res.groups.name;
    //        ?^ string | undefined
    // should be: string
}

[codpro2005]

Reference seems to be lost outside of object boundary. Spreading captures + namedCaptures on same parent object, would make this work, but this would go against the RegExp structure. This technically isn't a big issue since unnamed capture groups should always be avoided anyways.