feat(editor): add WPCR (Pet Care & Action) — 111th open format

Novel replacement for the implicit pet-management action
rules vanilla WoW scattered across spell_template
(Revive Pet / Mend Pet / Feed Pet / Dismiss Pet
definitions), npc_text (stable master gossip), and
per-class trainer SQL. Each entry binds one pet
management action to its dispatching spell, gold cost,
reagent requirement, cast time, cooldown, and pet/NPC
pre-conditions.

Eleven actionKind enum values cover the full pet
management surface: Revive / Mend / Feed / Dismiss /
Tame / BeastLore / Stable / Untrain / Rename / Abandon
(Hunter), plus Summon (Warlock minion conjures). The
classFilter field uses WCHC class-bit conventions
(4=Hunter, 256=Warlock) so a single WPCR catalog can
cover both class systems.

Three preset emitters: makeHunterCare (5 Hunter pet
care actions), makeStableActions (4 stable-master
gold-cost actions), makeWarlockMinions (4 Warlock minion
summons with shared 10s cooldown + Soul Shard reagent).

Validator's most novel checks are PER-KIND constraints:
Tame and Summon require requiresPet=0 (you can't tame
or summon while another pet is active) — these are
ERRORS, not warnings, since the action would simply
fail at runtime. Stable kind without requiresStableNPC
warns (stable-slot purchases are normally gated to
stable-master conversation). Tame kind without cooldown
warns (canonical 15s anti-macro-spam cooldown). The
TameBeast preset originally omitted this cooldown — the
validator caught and flagged it during smoke-test, fix
applied before commit.

Format count 110 -> 111. CLI flag count 1199 -> 1204.

tools/editor/cli_arg_required.cpp

@@ -341,6 +341,8 @@ const char* const kArgRequired[] = {
     "--gen-mnl", "--gen-mnl-dalaran", "--gen-mnl-undercity",
     "--info-wmnl", "--validate-wmnl",
     "--export-wmnl-json", "--import-wmnl-json",
+    "--gen-pcr", "--gen-pcr-stable", "--gen-pcr-warlock",
+    "--info-wpcr", "--validate-wpcr",
     "--gen-weather-temperate", "--gen-weather-arctic",
     "--gen-weather-desert", "--gen-weather-stormy",
     "--gen-zone-atmosphere",