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

Closes the WGOT open-format loop with --export-wgot-json /
--import-wgot-json, mirroring the JSON pairs added for
every other novel binary format. All 10 binary formats
added since WOL now have full JSON round-trip authoring.

Each game object round-trips all 13 scalar fields plus
dual int + name forms for typeId (16 enum values) and the
flags bitset.

The flag bitset emits string-array form so a hand-author
can write ["despawn"] instead of having to remember that
Despawn = 0x08. typeName makes "door/chest/herb-node/..."
obvious without needing to know typeId=11 means HerbNode.

Verified byte-identical round-trip on the dungeon preset
(5 objects: door + button + 2 chests + trap with full
WLOT cross-references and lockId fields preserved).

Adds 2 flags (516 documented total now).

tools/editor/cli_arg_required.cpp

@@ -46,6 +46,7 @@ const char* const kArgRequired[] = {
     "--export-wqt-json", "--import-wqt-json",
     "--gen-objects", "--gen-objects-dungeon", "--gen-objects-gather",
     "--info-wgot", "--validate-wgot",
+    "--export-wgot-json", "--import-wgot-json",
     "--gen-factions", "--gen-factions-alliance", "--gen-factions-wildlife",
     "--info-wfac", "--validate-wfac",
     "--gen-weather-temperate", "--gen-weather-arctic",