maps: regenerated JSON IR corpus from interscript-maps 2.5.1 (289 systems) (#26)

* maps: regenerate the compiled JSON IR corpus from interscript-maps 2.5.1 (289 systems)

Built with build-maps.rb against the ISC corpus through interscript-ruby's NodeAdapter (funcall-node casing fix + array-valued Any serialisation). 293 files: 289 systems + 4 libraries (posix, unicode, var-Cyrl, var-kor). One corpus-data gap noted: bgnpcgn-tuk-Cyrl-Latn-1993 depends on a 1979 map absent from the maps repo.

* maps: rebuild the bundled corpus from the TS converter with libraries

Replaces the corpus built by interscript-ruby's JsonIR with output of
the canonical builder — interscript-ts's ISC converter, the same
pipeline that produces the interscript/maps release artifact. 273 of
289 system JSONs were not byte-identical to production; the parity
gate caught Tamil (தமிழ் came out 'tamail̮a').

Also picks up interscript/maps#194: the four dependency libraries
(posix, unicode, var-Cyrl, var-kor) ship in the corpus again, and the
16 maps referencing var-kor aliases declare the dependency. This
restores bgnpcgn-deu (Tschüß! -> Tschueß!) and the other 17
library-dependent maps that api.interscript.org currently fails with
'Map dependency missing'.

The detect ranking (288 systems) and systemCodes count (289
addressable) are re-baselined to the corrected corpus; production
currently returns a truncated 48-map detect ranking and null for
library-dependent maps, so test/fixtures/parity.json records the
corrected behavior until the deploy catches up.

scripts/build-maps.rb pointed at the retired Ruby pipeline; it now
defers to scripts/build-maps.mjs, which runs the canonical TS builder
and regenerates manifest.js.

* style: prettier-format scripts/build-maps.mjs

Author: ronaldtse