feat(pipeline): add WGOT (Wowee Game Object Template) format

Novel open replacement for AzerothCore-style
gameobject_template SQL tables PLUS the Blizzard
GameObjectDisplayInfo.dbc / GameObject types metadata. The
16th open format added to the editor.

Game objects are the non-creature interactable scenery:
chests (with loot), doors, buttons, mailboxes, herb / ore
gathering nodes, fishing pools, signposts, mounts. Each
has a displayId for the model, a typeId driving its
interaction logic, and optional cross-references to a lock
(future WLCK) and loot table (existing WLOT).

Cross-references with previously-added formats:
  WSPN.entry.entryId (kind=GameObject) -> WGOT.entry.objectId
  WGOT.entry.lootTableId               -> WLOT.entry.creatureId
                                          (loot tables are
                                           universal — chests
                                           and creatures both
                                           key by ID)

The dungeon preset's Bandit Strongbox uses lootTableId=2000
to match WLOT's bandit chest table id, so the demo content
stack already wires together: spawn (WSPN object kind 2000)
-> object template (WGOT 2000) -> loot table (WLOT 2000).

Format:
  • magic "WGOT", version 1, little-endian
  • per object: objectId / displayId / name / typeId /
    size / castBarCaption / requiredSkill +
    requiredSkillValue / lockId / lootTableId /
    minOpenTimeMs..maxOpenTimeMs / flags

Enums:
  • TypeId (16): Door / Button / Chest / Container /
    QuestGiver / Text / Trap / Goober / Transport /
    Mailbox / MineralNode / HerbNode / FishingNode /
    Mount / Sign / Bonfire
  • Flags: Disabled / ScriptOnly / UsableFromMount /
    Despawn / Frozen / QuestGated

API: WoweeGameObjectLoader::save / load / exists /
findById; presets makeStarter (chest + mailbox + sign),
makeDungeon (door + button + 2 chests + trap with proper
WLOT cross-references), makeGather (Peacebloom herb +
Tin Vein ore + fishing pool with skill requirements).

CLI added (5 flags, 507 documented total now):
  --gen-objects / --gen-objects-dungeon / --gen-objects-gather
  --info-wgot / --validate-wgot

Validator catches: objectId=0 + duplicates, size<=0,
minOpenTime>maxOpenTime, gathering node without skill
requirement (anyone can harvest — usually a typo), chest
without loot table (script must populate), requiredSkillValue
set without requiredSkill (incoherent).

tools/editor/cli_arg_required.cpp

@@ -43,6 +43,8 @@ const char* const kArgRequired[] = {
     "--export-wcrt-json", "--import-wcrt-json",
     "--gen-quests", "--gen-quests-chain", "--gen-quests-daily",
     "--info-wqt", "--validate-wqt",
+    "--gen-objects", "--gen-objects-dungeon", "--gen-objects-gather",
+    "--info-wgot", "--validate-wgot",
     "--gen-weather-temperate", "--gen-weather-arctic",
     "--gen-weather-desert", "--gen-weather-stormy",
     "--gen-zone-atmosphere",