feat(editor): add WCTR (Currency Type) open catalog format

Open replacement for Blizzard's CurrencyTypes.dbc plus the
per-currency cap tables in CurrencyCategory.dbc. Defines the
in-game currencies that are NOT regular item stacks: Honor
Points, Arena Points, Justice Points, Valor Points, Conquest
Points, plus the various faction tokens (Champion's Seal,
Wintergrasp Mark of Honor, Emblem of Frost).

Distinct from regular items in WIT — currencies are tracked
per-character as scalar quantities with weekly + absolute caps,
not as stackable inventory slots. Some currencies are still
backed by a WIT item entry for the icon and tooltip text
(itemId field), while others (Honor, Arena) live entirely in
the currency system.

The cap model captures both shapes:
  - maxQuantity = absolute lifetime cap (Honor Points 75k)
  - maxQuantityWeekly = weekly earn cap, no absolute cap
    (Conquest Points 1650/wk)
  - both 0 = uncapped (faction tokens, Emblem of Frost)
earnableNow(id, current, weekly) is the engine helper that
returns the smaller of (remaining absolute, remaining weekly).

Cross-references back to WIT (itemId for tooltip art) and
WFAC (categoryId references factionId for FactionToken kind —
the rep gate that lets you spend the token).

Three preset emitters: --gen-ctr (4 PvP currencies covering
absolute, weekly-only, and uncapped tiers), --gen-ctr-pve (4
PvE raid currencies with same cap variety), --gen-ctr-faction
(4 faction tokens with their categoryId pointing at WFAC
faction ids).

Validation enforces id+name presence, currencyKind 0..5, no
duplicate ids; warns on:
  - maxQuantityWeekly > maxQuantity (weekly cap will never be
    reached, absolute cap blocks first)
  - FactionToken kind with categoryId=0 (rep gate breaks)
  - no caps + no itemId + no iconPath (currency has no display
    data and unbounded earn rate)

Wired through the cross-format table; WCTR appears automatically
in all 12 cross-format utilities. Format count 78 -> 79; CLI flag
count 965 -> 970.

tools/editor/cli_arg_required.cpp

@@ -240,6 +240,8 @@ const char* const kArgRequired[] = {
     "--gen-tle", "--gen-tle-mage", "--gen-tle-paladin",
     "--info-wtle", "--validate-wtle",
     "--export-wtle-json", "--import-wtle-json",
+    "--gen-ctr", "--gen-ctr-pve", "--gen-ctr-faction",
+    "--info-wctr", "--validate-wctr",
     "--gen-weather-temperate", "--gen-weather-arctic",
     "--gen-weather-desert", "--gen-weather-stormy",
     "--gen-zone-atmosphere",