feat(pipeline): WBND soulbind rules catalog (135th open format)

Novel replacement for the implicit item-binding policy vanilla
WoW carried in ItemTemplate.bondingType + per-item special-case
rules in the server's LootMgr (the 2-hour raid-loot trade
window was hard-coded; the account-bound-shared-across-faction
rule for heirlooms was a TBC+ addition with no formal data-
driven format). Each WBND entry binds one soulbind rule to its
bind kind (BoP / BoE / BoU / BoA / Soulbound / NoBind),
itemQualityFloor predicate (rule applies to items of this
quality and above unless overridden by a stricter rule),
tradable-window duration, raid-trade allowance, BoE-becomes-
BoP trigger, and cross-faction sharing flag.

Three presets capturing actual expansion-era policy evolution:
  --gen-bnd-vanilla  4 rules — Poor=NoBind, Common=BoE,
                     Uncommon+=BoP no-window, Epic+=Soulbound.
                     NO raid-trade window — the 1.12 master-
                     loot drama era
  --gen-bnd-tbc      5 rules adding the iconic 2-hour raid-
                     trade window for BoP items (Uncommon and
                     Rare quality)
  --gen-bnd-wotlk    6 rules adding Heirloom = BindOnAccount
                     + cross-faction (Alliance<->Horde via
                     account-mail) for the WotLK level-1-to-80
                     twink path

Validator catches: id+name required, bindKind 0..5,
itemQualityFloor 0..7, no duplicate ruleIds, no duplicate
(bindKind,qualityFloor) pairs (resolveForQuality lookup tie).
Hard error: tradableForRaidGroup=true with window=0 (window
expires instantly = no window at all). Warns on contradictions:
tradableForRaidGroup with non-BoP kind, window > 0 without
raid-trade flag, boeBecomesBoP without BoE kind,
accountBoundCrossFaction without BoA kind (all flag-ignored at
runtime).

Format count 134 -> 135. CLI flag count 1409 -> 1416.

tools/editor/cli_format_table.cpp

@@ -137,6 +137,7 @@ constexpr FormatMagicEntry kFormats[] = {
     {{'W','Q','G','R'}, ".wqgr",  "quests",    "--info-wqgr",      "Quest graph catalog"},
     {{'W','C','R','A'}, ".wcra",  "crafting",  "--info-wcra",      "Crafting recipe catalog"},
     {{'W','L','O','C'}, ".wloc",  "world",     "--info-wloc",      "World locations catalog"},
+    {{'W','B','N','D'}, ".wbnd",  "loot",      "--info-wbnd",      "Soulbind rules catalog"},
     {{'W','F','A','C'}, ".wfac",  "factions",  nullptr,            "Faction catalog"},
     {{'W','L','C','K'}, ".wlck",  "locks",     nullptr,            "Lock catalog"},
     {{'W','S','K','L'}, ".wskl",  "skills",    nullptr,            "Skill catalog"},