feat(editor): add WQSO JSON round-trip (export/import sidecar)

Closes the JSON round-trip gap on the quest sort catalog
format shipped last batch. --export-wqso-json emits all 9
scalar fields plus a dual int + name form for sortKind (12
values) so hand-edits can use either representation.
--import-wqso-json accepts either form. Verified byte-
identical round-trip on all three preset emitters (starter
3-sort generic / 10-class with WCHC bit masks / 8-profession
with WTSK enum cross-refs). 884 documented CLI flags.

tools/editor/cli_arg_required.cpp

@@ -205,6 +205,7 @@ const char* const kArgRequired[] = {
     "--export-wumv-json", "--import-wumv-json",
     "--gen-qso", "--gen-qso-class", "--gen-qso-profession",
     "--info-wqso", "--validate-wqso",
+    "--export-wqso-json", "--import-wqso-json",
     "--gen-weather-temperate", "--gen-weather-arctic",
     "--gen-weather-desert", "--gen-weather-stormy",
     "--gen-zone-atmosphere",