refactor(editor): hoist consumeJsonFlag into cli_arg_parse.hpp

The pattern

  bool jsonOut = (i + 1 < argc &&
                  std::strcmp(argv[i + 1], "--json") == 0);
  if (jsonOut) i++;

is repeated ~50 times across the editor — every --info-*
and --validate-* handler writes the same three lines to
detect and consume an optional --json follower. Extract
to consumeJsonFlag(int& i, int argc, char** argv) in
cli_arg_parse.hpp (the same header that already hosts
parseOptInt / parseOptFloat / parseOptUint / parseOptArg
for similar repeated patterns).

Adopted in the recently-added files:
  • cli_world_map.cpp     — both --info-womx and --validate-womx
  • cli_sound_catalog.cpp — both --info-wsnd and --validate-wsnd
  • cli_wom_info.cpp      — all 7 --info-* / --validate-wom
                            handlers (replace_all)

Also adopted the shared stripExt() helper from
cli_box_emitter.hpp instead of the new files' rolled-
own stripWomxExt / stripWsndExt — same observable behavior,
no more local copies of the extension-strip logic.

Future --info-/-validate handlers added to other formats
(WSP, WTC, etc.) get the same one-line jsonOut detection
without reinventing the peek-and-advance dance. Any later
adoption of consumeJsonFlag in the older 50+ sites is now
a mechanical replace_all edit per file.

Behavior preserved: --validate-wom and --info-womx and
--info-wsnd round-trip exactly as before, both text and
--json output unchanged.

tools/editor/cli_arg_parse.hpp

@@ -40,6 +40,19 @@ inline void parseOptUint(int& i, int argc, char** argv, uint32_t& value) {
     }
 }
 
+// Common --json-output flag pattern: every --info-* / --validate-*
+// handler (~50 sites across the editor) writes the same three lines
+// to detect and consume an optional `--json` follower. Hoisted here
+// so future handlers can do `bool jsonOut = consumeJsonFlag(i, argc, argv);`
+// instead of the open-coded peek-and-advance.
+inline bool consumeJsonFlag(int& i, int argc, char** argv) {
+    if (i + 1 < argc && std::strcmp(argv[i + 1], "--json") == 0) {
+        ++i;
+        return true;
+    }
+    return false;
+}
+
 } // namespace cli
 } // namespace editor
 } // namespace wowee