feat(pipeline): add WGTP (Wowee Game Tips) catalog

52nd open format — replaces GameTips.dbc plus loading-screen
tutorial hint tables. Defines the rotating tips shown during
world loads, the contextual tutorial hints that fire on first
gameplay events (first quest accept, first death, first
dungeon entry), and the persistent tooltip-help strings that
explain UI elements.

4 display kinds (LoadingScreen / Tutorial / TooltipHelp /
Hint), 7 audience-filter bits (Alliance / Horde / NewPlayer /
Hardcore / PvE / PvP / Roleplay) for pool selection, level
range gating (minLevel + maxLevel), displayWeight for
relative frequency within the pool, optional WPCN condition
cross-ref for further gating, and class-mask restriction
matching WCHC bit positions.

Cross-references with prior formats — conditionId points at
WPCN.conditionId for advanced gating; requiredClassMask uses
the same WCHC.classId bit layout as WGLY/WSET.

CLI: --gen-tips (3 generic loading-screen tips), --gen-tips-
new-player (5 onboarding Tutorial-kind tips for level 1-15,
weighted higher for new players), --gen-tips-advanced (4
endgame tips for level 70+ covering raid mechanics / arena /
daily professions / dungeon finder), --info-wgtp,
--validate-wgtp with --json variants. Validator catches
id/name/text required, kind 0..3, audienceFilter=0 (tip
never shown), invalid level range, displayWeight=0 (in pool
but never picked) warning, and brevity check (>280 chars)
on Tutorial / Hint kinds that need to fit on screen.

Format graph: 51 → 52 binary formats. CLI flag count: 770
→ 775.

tools/editor/cli_format_table.cpp

@@ -54,6 +54,7 @@ constexpr FormatMagicEntry kFormats[] = {
     {{'W','T','S','K'}, ".wtsk",  "crafting",  "--info-wtsk",      "Trade skill recipe catalog"},
     {{'W','C','E','Q'}, ".wceq",  "creatures", "--info-wceq",      "Creature equipment loadout catalog"},
     {{'W','S','E','T'}, ".wset",  "items",     "--info-wset",      "Item set / tier-bonus catalog"},
+    {{'W','G','T','P'}, ".wgtp",  "ui",        "--info-wgtp",      "Game tips / tutorial catalog"},
     {{'W','F','A','C'}, ".wfac",  "factions",  nullptr,            "Faction catalog"},
     {{'W','L','C','K'}, ".wlck",  "locks",     nullptr,            "Lock catalog"},
     {{'W','S','K','L'}, ".wskl",  "skills",    nullptr,            "Skill catalog"},