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.

include/pipeline/wowee_gossip.hpp

@@ -0,0 +1,123 @@
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+namespace wowee {
+namespace pipeline {
+
+// Wowee Open Gossip Menu catalog (.wgsp) — novel 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.
+//
+// This format closes the WCRT.gossipId cross-reference gap
+// from batch 116 — until now WCRT had a gossipId field that
+// pointed to a format that didn't exist yet.
+//
+// Cross-references with previously-added formats:
+//   WCRT.entry.gossipId        → WGSP.entry.menuId
+//   WGSP.option.actionTarget (kind=Submenu) → WGSP.entry.menuId
+//                                              (intra-format chain)
+//   WGSP.option.actionTarget (kind=Vendor / Trainer)
+//                                          → WTRN.entry.npcId
+//   WGSP.option.actionTarget (kind=Quest)  → WQT.entry.questId
+//
+// Binary layout (little-endian):
+//   magic[4]            = "WGSP"
+//   version (uint32)    = current 1
+//   nameLen + name (catalog label)
+//   entryCount (uint32)
+//   entries (each):
+//     menuId (uint32)
+//     titleLen + titleText
+//     optionCount (uint8) + pad[3]
+//     options (optionCount × {
+//       optionId (uint32)
+//       textLen + text
+//       kind (uint8) + pad[3]
+//       actionTarget (uint32)
+//       requiredFlags (uint32)
+//       moneyCostCopper (uint32)
+//     })
+struct WoweeGossip {
+    enum OptionKind : uint8_t {
+        Close         = 0,    // closes the menu, no action
+        Submenu       = 1,    // jumps to another menuId
+        Vendor        = 2,    // opens vendor inventory window
+        Trainer       = 3,    // opens trainer spell window
+        Quest         = 4,    // opens quest dialog
+        Tabard        = 5,    // opens tabard customization
+        Banker        = 6,    // opens bank
+        Innkeeper     = 7,    // sets hearth + opens vendor
+        FlightMaster  = 8,    // opens taxi node
+        TextOnly      = 9,    // dialogue only, no action
+        Script        = 10,   // triggers a server-side script
+        Battlemaster  = 11,
+        Auctioneer    = 12,
+    };
+
+    enum OptionFlags : uint32_t {
+        AllianceOnly  = 0x01,
+        HordeOnly     = 0x02,
+        Coinpouch     = 0x04,    // shows the coin icon when paid
+        QuestGated    = 0x08,    // visible only with matching quest
+        Closes        = 0x10,    // closes the menu after the action
+    };
+
+    struct Option {
+        uint32_t optionId = 0;
+        std::string text;
+        uint8_t kind = TextOnly;
+        uint32_t actionTarget = 0;     // submenu / NPC / quest id
+        uint32_t requiredFlags = 0;
+        uint32_t moneyCostCopper = 0;
+    };
+
+    struct Entry {
+        uint32_t menuId = 0;
+        std::string titleText;
+        std::vector<Option> options;
+    };
+
+    std::string name;
+    std::vector<Entry> entries;
+
+    bool isValid() const { return !entries.empty(); }
+
+    // Lookup by menuId — nullptr if not present.
+    const Entry* findById(uint32_t menuId) const;
+
+    static const char* optionKindName(uint8_t k);
+};
+
+class WoweeGossipLoader {
+public:
+    static bool save(const WoweeGossip& cat,
+                     const std::string& basePath);
+    static WoweeGossip load(const std::string& basePath);
+    static bool exists(const std::string& basePath);
+
+    // Preset emitters used by --gen-gossip* variants.
+    //
+    //   makeStarter — single menu with greeting + 3 options
+    //                  (vendor / trainer / close).
+    //   makeInnkeeper — menu 4001 (matches WCRT.gossipId on
+    //                    Bartleby): set hearth + browse goods
+    //                    + bind to flight + close.
+    //   makeQuestGiver — branching menu: greeting + 2 quests +
+    //                     submenu "tell me about the area"
+    //                     leading to lore text + close.
+    static WoweeGossip makeStarter(const std::string& catalogName);
+    static WoweeGossip makeInnkeeper(const std::string& catalogName);
+    static WoweeGossip makeQuestGiver(const std::string& catalogName);
+};
+
+} // namespace pipeline
+} // namespace wowee