feat(editor): add WIT JSON round-trip authoring workflow

Closes the WIT open-format loop with --export-wit-json /
--import-wit-json, mirroring the WOL/WOW/WOMX/WSND/WSPN
JSON pairs. All 6 binary formats added since WOL now have
full JSON round-trip authoring.

Each entry round-trips all 18 scalar fields plus the
variable-length stats array. Three enum-typed fields emit
dual int + name forms so a hand-author can use either:
  • quality       (poor..heirloom)
  • itemClass     (consumable / weapon / armor / quest / ...)
  • inventoryType (head, chest, weapon-1h, ...)

Stats round-trip with both type int + typeName string so
"strength: 5" reads more naturally than "type=4, value=5"
in hand-edit JSON.

Verified byte-identical round-trip on the makeWeapons
preset (5 items spanning common -> legendary, both 1H and
2H slots, full damage / speed / stat coverage). Adds 2
flags (488 documented total now).

tools/editor/cli_help.cpp

@@ -877,6 +877,10 @@ void printUsage(const char* argv0) {
     std::printf("                         Print WIT item entries (id / ilvl / quality / class / slot / buy price / name)\n");
     std::printf("  --validate-wit <wit-base> [--json]\n");
     std::printf("                         Static checks: itemId>0 + unique, weapon damage>0 + min<=max, equippable durability>0, sell<buy\n");
+    std::printf("  --export-wit-json <wit-base> [out.json]\n");
+    std::printf("                         Export binary .wit to a human-editable JSON sidecar (defaults to <base>.wit.json)\n");
+    std::printf("  --import-wit-json <json-path> [out-base]\n");
+    std::printf("                         Import a .wit.json sidecar back into binary .wit (accepts quality/class/slot int OR name string)\n");
     std::printf("  --gen-loot <wlot-base> [name]\n");
     std::printf("                         Emit .wlot starter loot catalog: 1 creature with 1 drop slot, 1 item @ 50%%, 0..50 copper\n");
     std::printf("  --gen-loot-bandit <wlot-base> [name]\n");