feat(editor): add WPRG (PvP Ranking grades) — 122nd open format

Novel replacement for the hardcoded 14-rank vanilla WoW
PvP ladder (Private through Grand Marshal Alliance,
Scout through High Warlord Horde). Each entry binds one
(factionFilter, tier) combination to its display name,
weekly RP threshold to maintain rank, lifetime honor
for first-time achievement, title prefix for player-
name display, and tier-set gear reward.

The vanilla rank-ladder system used a weekly RP-decay
mechanic that punished any week without play with rank-
loss; this catalog stores both the weekly threshold
(maintenance) and the lifetime threshold (achievement)
since both are needed for accurate rank-progression
simulation.

Three preset emitters spanning the rank ladder:
makeAllianceRanks (7 lower-tier ranks Private through
Knight-Lieutenant), makeHordeRanks (7 mirrored Horde
titles Scout through Blood Guard with identical honor
thresholds — factionFilter disambiguates the shared
"Sergeant" title), makeHighRanks (8 high-tier ranks
across both factions Knight-Captain through Lt.
Commander, tiers 8-11 with the iconic legendary
battlegear shoulder unlocks).

Tier 14 (Grand Marshal / High Warlord) intentionally
omitted from presets — it's the legendary top-rank
that historically required dedicated 24/7 grinding.
Catalog supports tiers 1..14 in the schema; consumers
extend as needed.

Validator's most novel checks: per-(faction, tier)
tuple uniqueness — two ranks at the same tier for the
same faction would tie at runtime when the rank-
progression UI looks up "what's tier 5 for Alliance?"
Plus per-faction honor-threshold monotonicity — a
higher tier requiring less honor than a lower tier
would let players "downrank" by gaining honor, which
is a content authoring bug.

Format count 121 -> 122. CLI flag count 1276 -> 1281.

tools/editor/cli_list_formats.cpp

@@ -146,6 +146,7 @@ constexpr FormatRow kFormats[] = {
     {"WSKP", ".wskp",  "world",     "LightParams.dbc + Light.dbc diurnal","Sky parameters catalog (per-zone keyframes)"},
     {"WCFG", ".wcfg",  "server",    "worldserver.conf flat-text config",  "Server config catalog (polymorphic Float/Int/Bool/String values)"},
     {"WANV", ".wanv",  "events",    "GameEvent SQL + per-holiday script", "Anniversary & recurring event catalog (cron-like scheduling)"},
+    {"WPRG", ".wprg",  "pvp",       "vanilla 14-rank PvP ladder ladder",  "PvP ranking grades catalog (faction + tier + honor thresholds)"},
 
     // Additional pipeline catalogs without the alternating
     // gen/info/validate CLI surface (loaded by the engine