feat(pipeline): WPRC spell proc rules catalog (138th open format)

Novel replacement for the implicit proc-on-event spell triggers
vanilla WoW carried in SpellProcEvents (later rows of
Spell.dbc) + the per-spell procFlags + procChance fields
scattered across multiple DBC tables. Each WPRC entry binds
one proc rule to its source spell (the aura/buff that has the
proc), trigger event (OnHit/OnCrit/OnCast/OnTakeDamage/OnHeal/
OnDodge/OnParry/OnBlock/OnKill), proc chance in basis points
(0..10000 = 0..100%), internal cooldown ms, the spell to
trigger on proc, max-stacks-on-target cap, and optional
condition flags (RequireMeleeWeapon / RequireSpellSchool /
ExcludeAutoAttack / OnlyFromBehind / OnlyVsPvPTarget).

Three presets covering common vanilla proc archetypes:
  --gen-prc-weapon  3 weapon-enchant procs (Crusader 2%
                    OnHit / Lifestealing 5% / Fiery Weapon
                    7% with 1.5s ICD to handle dual-wield)
  --gen-prc-ret     4 Retribution Paladin procs (Vengeance
                    OnCrit 5-stack / Seal of Justice OnHit
                    25% with 60s per-target ICD / Reckoning
                    OnBlock 10% extra-attack / Sanctity Aura
                    OnCast bookkeeping)
  --gen-prc-rage    3 Warrior Rage-generation procs
                    (Bloodrage OnCast / Berserker Rage
                    OnCast immunity aura / Anger Mgmt OnDodge
                    passive)

Validator catches: id+name+sourceSpellId+procEffectSpellId
required, triggerEvent 0..8, procChancePct in 1..10000
(0 = never fires; > 10000 = > 100% basis points). CRITICAL:
sourceSpellId == procEffectSpellId on OnCast trigger errors
(infinite proc loop — the effect re-casts itself which fires
the proc again). Warns on 100% + 0ms ICD on high-frequency
events (OnHit/OnCrit/OnTakeDamage) — would spam every swing
without rate limiting.

Validator immediately caught a real preset bug during smoke-
test: Berserker Rage initially had sourceSpellId=18499 ==
procEffectSpellId=18499 with OnCast trigger. Validator
correctly errored with "infinite proc loop". Fixed preset to
use procEffectSpellId=23691 (the immunity-aura effect — a
distinct spell from the cast trigger).

Format count 137 -> 138. CLI flag count 1436 -> 1443.

tools/editor/cli_arg_required.cpp

@@ -422,6 +422,8 @@ const char* const kArgRequired[] = {
     "--gen-irc-bear", "--gen-irc-eagle", "--gen-irc-tiger",
     "--info-wirc", "--validate-wirc",
     "--export-wirc-json", "--import-wirc-json",
+    "--gen-prc-weapon", "--gen-prc-ret", "--gen-prc-rage",
+    "--info-wprc", "--validate-wprc",
     "--gen-weather-temperate", "--gen-weather-arctic",
     "--gen-weather-desert", "--gen-weather-stormy",
     "--gen-zone-atmosphere",