Fix Dire Beast (120679): summoned beasts now attack the hunter target

The spell script spell_hun_dire_beast summoned the zone "Beast" guardian but
never ordered it to attack, and the ~108 summon templates had no AIName/ScriptName,
so the beasts idled next to the owner instead of engaging the target.

Add a dedicated ScriptedAI npc_pet_hun_dire_beast (mirroring npc_pet_hunter_snake_trap,
minus the snake-specific level-40 health formula and poison) that, on spawn, attacks
the summoner target (owner GetVictim / getAttackerForHelper), and bind it to the 108
inert level-1 friendly "Beast" summon templates via sql/sylvania/dire_beast_ai_20260705.sql.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

sql/sylvania/dire_beast_ai_20260705.sql

@@ -0,0 +1,15 @@
+-- Dire Beast (spell 120679 "Bête féroce") — the summoned "Beast" guardians had no AI/ScriptName
+-- and never engaged the hunter's target (they idled next to the owner).
+-- Bind them to the new C++ AI npc_pet_hun_dire_beast (added to src/server/scripts/Pet/pet_hunter.cpp),
+-- which orders the summon to attack the summoner's target on spawn.
+-- Targets the 108 inert level-1 friendly "Beast" summon templates (one per zone/expansion).
+-- 2026-07-05
+UPDATE `creature_template`
+SET `ScriptName` = 'npc_pet_hun_dire_beast'
+WHERE `name` = 'Beast'
+  AND `type` = 1
+  AND `faction` = 35
+  AND `minlevel` = 1
+  AND `maxlevel` = 1
+  AND (`AIName` IS NULL OR `AIName` = '')
+  AND (`ScriptName` IS NULL OR `ScriptName` = '');