feat(pipeline): add WTKN (Wowee Token catalog) format

Novel open replacement for Blizzard's Currency.dbc +
CurrencyCategory.dbc + CurrencyTypes.dbc + the AzerothCore-
style player_currency SQL tables. The 28th open format
added to the editor.

Defines secondary currency tokens beyond gold: Honor Points
(PvP), Arena Points (rated PvP), Marks of Honor (per
battleground), faction reputation tokens, holiday-event
currencies. Each token has a balance cap, optional weekly
cap (regenerating earnings limit), and a category for
grouping in the player's currency tab.

Cross-references:
  WTRN.item.extendedCost -> WTKN.entry.tokenId
                             (vendors can charge in tokens
                              instead of copper — when
                              extendedCost > 0 the runtime
                              looks up the matching token)

Format:
  • magic "WTKN", version 1, little-endian
  • per token: tokenId / name / description / iconPath /
    category / maxBalance / weeklyCap / flags

Enums:
  • Category (6): Misc / Pvp / Reputation / Crafting /
                   Seasonal / Holiday
  • Flags:        AccountWide / Tradeable / HiddenUntilEarned /
                   ResetsOnLogout / ConvertsToGold

API: WoweeTokenLoader::save / load / exists / findById.

Three preset emitters showcase typical token shapes:
  • makeStarter  — 3 tokens (Honor / Marks / Stormwind Guard
                    rep) covering Pvp + Reputation categories
  • makePvp      — full PvP set: Honor (75k) + Arena (5k +
                    weekly 1500) + 6 BG marks of honor for
                    classic + TBC + WotLK battlegrounds
  • makeSeasonal — 4 holiday tokens (Tricky Treats /
                    Brewfest / Coin of Ancestry / Stranger's
                    Gift) all flagged ResetsOnLogout to make
                    them event-bound

CLI added (5 flags, 592 documented total now):
  --gen-tokens / --gen-tokens-pvp / --gen-tokens-seasonal
  --info-wtkn / --validate-wtkn

Validator catches: tokenId=0 + duplicates, empty name,
unknown category, weeklyCap > maxBalance (cap unreachable),
ResetsOnLogout + AccountWide combo (incoherent — account
state survives logout by definition).

include/pipeline/wowee_tokens.hpp

@@ -0,0 +1,107 @@
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+namespace wowee {
+namespace pipeline {
+
+// Wowee Open Token / Currency catalog (.wtkn) — novel
+// replacement for Blizzard's Currency.dbc +
+// CurrencyCategory.dbc + CurrencyTypes.dbc + the
+// AzerothCore-style player_currency SQL tables. The 28th
+// open format added to the editor.
+//
+// Defines secondary currency tokens beyond gold: Honor
+// Points (PvP), Arena Points (rated PvP), Marks of Honor
+// (per battleground), faction reputation tokens, etc. Each
+// token has a balance cap, optional weekly cap (regenerating
+// per-week limit on earnings), and a category for grouping
+// in the player's currency tab.
+//
+// Cross-references with previously-added formats:
+//   WTRN.item.extendedCost → WTKN.entry.tokenId
+//                            (vendors can charge in tokens
+//                             instead of copper — when
+//                             extendedCost > 0 the runtime
+//                             looks up the corresponding token)
+//
+// Binary layout (little-endian):
+//   magic[4]            = "WTKN"
+//   version (uint32)    = current 1
+//   nameLen + name (catalog label)
+//   entryCount (uint32)
+//   entries (each):
+//     tokenId (uint32)
+//     nameLen + name
+//     descLen + description
+//     iconLen + iconPath
+//     category (uint8) + flags_byte (uint8) + pad[2]
+//     maxBalance (uint32)        -- 0 = unlimited
+//     weeklyCap (uint32)         -- 0 = no weekly cap
+//     flags (uint32)
+struct WoweeToken {
+    enum Category : uint8_t {
+        Misc       = 0,
+        Pvp        = 1,    // Honor / Arena / Marks
+        Reputation = 2,    // faction-specific tokens
+        Crafting   = 3,    // profession turn-in tokens
+        Seasonal   = 4,    // event-only currencies
+        Holiday    = 5,
+    };
+
+    enum Flags : uint32_t {
+        AccountWide       = 0x01,
+        Tradeable         = 0x02,
+        HiddenUntilEarned = 0x04,
+        ResetsOnLogout    = 0x08,
+        ConvertsToGold    = 0x10,
+    };
+
+    struct Entry {
+        uint32_t tokenId = 0;
+        std::string name;
+        std::string description;
+        std::string iconPath;
+        uint8_t category = Misc;
+        uint32_t maxBalance = 0;        // 0 = unlimited
+        uint32_t weeklyCap = 0;         // 0 = no cap
+        uint32_t flags = 0;
+    };
+
+    std::string name;
+    std::vector<Entry> entries;
+
+    bool isValid() const { return !entries.empty(); }
+
+    const Entry* findById(uint32_t tokenId) const;
+
+    static const char* categoryName(uint8_t c);
+};
+
+class WoweeTokenLoader {
+public:
+    static bool save(const WoweeToken& cat,
+                     const std::string& basePath);
+    static WoweeToken load(const std::string& basePath);
+    static bool exists(const std::string& basePath);
+
+    // Preset emitters used by --gen-tokens* variants.
+    //
+    //   makeStarter — 3 tokens covering Pvp / Reputation /
+    //                  Misc categories with realistic caps.
+    //   makePvp     — full PvP currency set: Honor (75k cap)
+    //                  + Arena Points (5k cap, weekly) + Marks
+    //                  of Honor for 6 classic battlegrounds.
+    //   makeSeasonal — 4 holiday-event tokens (Hallow's End
+    //                   masks, Brewfest tokens, Winter's Veil
+    //                   coins, etc.) all flagged ResetsOnLogout
+    //                   to be event-bound.
+    static WoweeToken makeStarter(const std::string& catalogName);
+    static WoweeToken makePvp(const std::string& catalogName);
+    static WoweeToken makeSeasonal(const std::string& catalogName);
+};
+
+} // namespace pipeline
+} // namespace wowee