feat(pipeline): add WGSP (Wowee Gossip Menu) format

Novel open replacement for AzerothCore-style gossip_menu +
gossip_menu_option + npc_text SQL tables PLUS the Blizzard
NpcText.dbc family. The 23rd open format added to the
editor.

An NPC's dialogue tree: a menu of options the player can
pick from when right-clicking the NPC. Each option may
bridge to another menu, trigger a vendor / trainer
interaction, offer a quest, etc. The simplified per-option
model (kind + actionTarget + flags + moneyCost) covers the
common cases without needing separate npc_text condition
tables.

Closes a major cross-format gap: WCRT.entry.gossipId has
existed since batch 116 (when WCRT was added) but pointed
to a format that didn't exist yet. The innkeeper preset's
menuId=4001 deliberately matches WCRT's Bartleby NPC so
the demo content stack can wire WCRT.gossipId = 4001 once
that field is plumbed through the runtime.

Cross-references:
  WCRT.entry.gossipId        -> WGSP.entry.menuId
  WGSP.option.actionTarget (Submenu) -> WGSP.entry.menuId
  WGSP.option.actionTarget (Vendor / Trainer)
                              -> WTRN.entry.npcId
  WGSP.option.actionTarget (Quest)  -> WQT.entry.questId

Format:
  • magic "WGSP", version 1, little-endian
  • per menu: menuId / titleText + options[]
  • per option: optionId / text / kind / actionTarget /
    requiredFlags / moneyCostCopper

Enums:
  • OptionKind (13): Close / Submenu / Vendor / Trainer /
                     Quest / Tabard / Banker / Innkeeper /
                     FlightMaster / TextOnly / Script /
                     Battlemaster / Auctioneer
  • OptionFlags:    AllianceOnly / HordeOnly / Coinpouch /
                     QuestGated / Closes

API: WoweeGossipLoader::save / load / exists / findById;
presets makeStarter (1 menu with vendor + trainer + close),
makeInnkeeper (2-menu tree: main menu 4001 with hearth /
vendor / flight / submenu options + lore submenu 4002 that
links back), makeQuestGiver (1 menu with 2 quest options
referencing WQT 1 and 100, plus a paid respec script
exercising the Coinpouch flag with a 10g cost).

CLI added (5 flags, 558 documented total now):
  --gen-gossip / --gen-gossip-innkeeper / --gen-gossip-questgiver
  --info-wgsp / --validate-wgsp

Validator catches: menuId=0 + duplicates, empty title /
options, unknown option kind, empty option text, Submenu
options pointing at non-existent menuIds (intra-format
cross-reference resolution), Coinpouch flag without
moneyCost (misleading UI), AllianceOnly+HordeOnly conflict.

tools/editor/cli_dispatch.cpp

@@ -50,6 +50,7 @@
 #include "cli_spells_catalog.hpp"
 #include "cli_achievements_catalog.hpp"
 #include "cli_trainers_catalog.hpp"
+#include "cli_gossip_catalog.hpp"
 #include "cli_quest_objective.hpp"
 #include "cli_quest_reward.hpp"
 #include "cli_clone.hpp"
@@ -141,6 +142,7 @@ constexpr DispatchFn kDispatchTable[] = {
     handleSpellsCatalog,
     handleAchievementsCatalog,
     handleTrainersCatalog,
+    handleGossipCatalog,
     handleQuestObjective,
     handleQuestReward,
     handleClone,