feat(pipeline): add WCHC (Wowee Character Classes/Races) format

Novel open replacement for Blizzard's CharClasses.dbc +
CharRaces.dbc + CharStartOutfit.dbc trio. The 27th open
format added to the editor — completes the foundational
character-creation surface.

One file holds three flat arrays:
  • classes — playable classes (Warrior / Mage / etc.) with
              power type (mana/rage/focus/energy/runic),
              base HP+power scaling, faction availability
  • races   — playable races with faction (Alliance/Horde/
              Neutral), starting map+zone, default language
              spell, base stats, racial mount spell
  • outfits — starting gear loadout per (class, race, gender)
              triple, listing item IDs and display slots

Cross-references with previously-added formats:
  WCHC.race.startingMapId        -> WMS.map.mapId
  WCHC.race.startingZoneAreaId   -> WMS.area.areaId
  WCHC.race.defaultLanguageSpellId -> WSPL.entry.spellId
  WCHC.race.mountSpellId         -> WSPL.entry.spellId
  WCHC.outfit.items.itemId       -> WIT.entry.itemId

The starter preset's outfits use real WIT itemIds (1=Worn
Shortsword, 2=Linen Vest, 3=Healing Potion) so the demo
content stack is consistent: a freshly created Human Warrior
in WCHC starts with WIT items 1/2/3, drops them on death
into a WLOT-tracked corpse loot, and can be respawned via
WSPN, etc.

Format:
  • magic "WCHC", version 1, little-endian
  • classes[]: classId / name / icon / powerType / display /
    baseHP+perLevel / basePower+perLevel / factionAvailability
  • races[]: raceId / name / icon / factionId / male+female
    displayId / 5 base stats / startingMap+zone /
    defaultLanguage+mount spell IDs
  • outfits[]: classId+raceId+gender + items[]
    (each: itemId + displaySlot)

Enums:
  • PowerType (6): Mana / Rage / Focus / Energy / RunicPower / Runes
  • RaceFaction (3): Alliance / Horde / Neutral
  • Gender: Male / Female
  • FactionAvailability bitmask: AvailableAlliance, AvailableHorde

API: WoweeCharsLoader::save / load / exists +
WoweeChars::findClass / findRace / findOutfit (by class+race+gender).

CLI added (5 flags, 585 documented total now):
  --gen-chars / --gen-chars-alliance / --gen-chars-allraces
  --info-wchc / --validate-wchc

Validator catches: ids unique, baseHealth=0 (instant-death
character), factionAvailability=0 (no faction can pick),
empty names, factionId out of range, outfit references to
non-existent class/race ids (cross-format resolution),
gender > 1, outfit items with itemId=0, outfit with no
items (warning — naked character).

tools/editor/cli_arg_required.cpp

@@ -76,6 +76,8 @@ const char* const kArgRequired[] = {
     "--export-wtal-json", "--import-wtal-json",
     "--gen-maps", "--gen-maps-classic", "--gen-maps-bgarena",
     "--info-wms", "--validate-wms",
+    "--gen-chars", "--gen-chars-alliance", "--gen-chars-allraces",
+    "--info-wchc", "--validate-wchc",
     "--gen-weather-temperate", "--gen-weather-arctic",
     "--gen-weather-desert", "--gen-weather-stormy",
     "--gen-zone-atmosphere",