feat(pipeline): add WCEQ (Wowee Creature Equipment) — 50th open format

Replaces the AzerothCore-style creature_equip_template SQL
tables plus the visible-weapon / shield / ranged-slot data
that was traditionally embedded in creature templates. Closes
a long-standing gap in the creature subsystem: until now WCRT
defined a creature's stats, WSPN placed it in the world, and
WLOT defined what it drops — but nothing defined what items
it visibly equips.

Each entry binds a creatureId to up to three equipped items
(main hand / off hand / ranged) plus the visual kit that
fires when the main-hand weapon is brandished. equipFlags
bits encode hidden / dual-wield / shield-offhand /
thrown-ranged / 2H polearm to drive the renderer's
attachment-point selection.

Cross-references with prior formats — creatureId points at
WCRT.creatureId, mainHandItemId / offHandItemId / rangedItemId
all point at WIT.itemId, and mainHandVisualId points at
WSVK.visualKitId so brandished weapons can play their
signature glow / aura.

CLI: --gen-ceq (3 generic guard/hunter/rogue starters),
--gen-ceq-bosses (4 iconic loadouts incl. Frostmourne and
Illidan's warglaives, with WSVK visual cross-refs),
--gen-ceq-ranged (3 ranged-only rifle/bow/crossbow loadouts),
--info-wceq, --validate-wceq with --json variants. Validator
catches id=0/duplicates, missing creatureId, all-empty-slots
warning, kFlagDualWield without both hand items, kFlagShield
without offhand item, mutually-exclusive dual-wield + shield,
and 2H polearm with offhand item filled.

Format graph milestone: 50 distinct binary formats. CLI flag
count: 754 → 760.

tools/editor/cli_list_formats.cpp

@@ -74,6 +74,7 @@ constexpr FormatRow kFormats[] = {
     {"WWUI", ".wwui",  "ui",        "WorldStateUI.dbc + world_state",   "World-state UI (BG scoreboards / siege counters)"},
     {"WPCN", ".wpcn",  "logic",     "PlayerCondition.dbc + conditions", "Player condition (gates, AND/OR/NOT chains)"},
     {"WTSK", ".wtsk",  "crafting",  "SkillLineAbility.dbc + recipes",   "Trade skill recipes (per-profession crafts)"},
+    {"WCEQ", ".wceq",  "creatures", "creature_equip_template",          "Creature equipment loadout (visible weapons)"},
 
     // Additional pipeline catalogs without the alternating
     // gen/info/validate CLI surface (loaded by the engine