⚡ Simpler, faster response-data parser
#201
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Several versions were tried: `Hash[name].call`, `case name when regexp`, `case name.to_sym`, etc, but benchmarks clearly showed `case string.upcase when "str"` as fastest. This change also documents which RFC covers which response types.
Use `peek_re(RE_RESPONSE_TYPE)` and the `TAGGED_EXT_LABEL` regexp, to unify numeric and non-numeric types in the same case stmt. This is much simpler than two tier version, but I don't have benchmarks as to whether or not this version of the code performs any better. Add aliases for nz-number. Not validating that the numbers are within their allowed range, for now at least.
The case statement is sorted _roughly_ in the order of frequency... but I need to collect more data to reliably make a claim about that. In the meantime, this order made sense to me... more or less. Current standard (both RFC3501 and RFC9051) responses are sorted first, and deprecated, uncommon, unsupported, etc responses are sorted last.
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response_dataandnumeric_responseinto a single case statement, using a regexp for lookahead.