feat(editor): add WPTT (Pet Talent Tree) — 107th open format

Novel replacement for the PetTalent.dbc + PetTalentTab.dbc
pair that defined the Hunter pet talent system added in
WotLK. Each entry is one talent in one of the three pet
trees (Cunning/utility, Ferocity/DPS, Tenacity/tank),
placed at a (tier, column) grid position with a per-rank
spell ID array, an optional prerequisite-talent edge,
and a legacy loyalty-level requirement carried over
from Vanilla pet happiness mechanics.

Combines three patterns previously seen separately into
one format: variable-length payload (spellIdsByRank[]
mirroring WCMR's members[]), graph edge
(prerequisiteTalentId mirroring WBAB's previousRankId),
and grid placement (tier+column — first format with
explicit 2D layout coordinates the renderer can use to
draw the talent tree UI).

Three preset emitters one per tree: makeFerocity (6
talents tiers 0-3 with prereq chain CobraReflexes ->
SpikedCollar -> SpidersBite plus parallel Serpent ->
Boars -> Rabid), makeCunning (5 talents Dash/Owls/
Recovery/Cornered/Phoenix), makeTenacity (5 talents
Charge/Stamina/Stomp/Taunt/LastStand).

Validator's most novel checks combine grid + graph
constraints unique to talent-tree formats:
- (tree, tier, column) cell uniqueness — two talents in
  the same cell would render on top of each other
- prereq must resolve to an existing talent IN THE SAME
  TREE (cross-tree prereqs are illegal)
- prereq tier must be STRICTLY LESS than this tier
  (talents only depend on earlier tiers, no
  same-tier or backward dependencies)
- spellIdsByRank.size() must EQUAL maxRank exactly
- no zero spell IDs within the rank array
Plus the standard: id+name required, treeKind 0..2,
tier 0..6 (7 tiers), column 0..2 (3 columns), maxRank
1..5, no duplicate talentIds, no self-referencing
prereqs.

Format count 106 -> 107. CLI flag count 1170 -> 1175.

tools/editor/cli_list_formats.cpp

@@ -131,6 +131,7 @@ constexpr FormatRow kFormats[] = {
     {"WSPM", ".wspm",  "spellfx",   "AreaTrigger.dbc + decal blob",      "Spell persistent marker catalog (AoE ground decals)"},
     {"WLDN", ".wldn",  "server",    "TutorialPopup + LevelMilestone msgs","Learning notification catalog (level-up milestones)"},
     {"WCRE", ".wcre",  "creatures", "creature_template resist + immunity","Creature resist + CC-immunity profile catalog"},
+    {"WPTT", ".wptt",  "pets",      "PetTalent.dbc + PetTalentTab.dbc",   "Hunter pet talent tree catalog (3 trees, grid+graph)"},
 
     // Additional pipeline catalogs without the alternating
     // gen/info/validate CLI surface (loaded by the engine