feat(pipeline): add WKBD (Wowee Keybinding) catalog

55th open format — replaces KeyBinding.dbc plus the
AzerothCore-style default-keybind SQL data. Defines the key
bindings shipped with the game: movement (W/A/S/D),
targeting (Tab), action bars (1-9, 0, -, =), UI panels
(C/I/B/P/N/L), chat (Enter), camera (Insert/Delete).

Each binding has an internal action name (SCREAMING_SNAKE
convention — "MOVE_FORWARD"), a primary key, an optional
alternate key, a category for the keybindings UI grouping,
and a flag indicating whether the user can override it.
Hardcoded engine bindings (alt-F4, ESC) set
isUserOverridable=0 so the rebind dialog can't accidentally
break them.

9 categories (Movement / Combat / Targeting / Camera /
UIPanels / Chat / Macro / Bar / Other) for the rebind
dialog grouping.

CLI: --gen-kbd (3 essential WASD/Tab/C bindings), --gen-kbd-
movement (8 movement: WASD + arrow alternates + jump +
autorun), --gen-kbd-ui (10 UI panel bindings covering all
the standard interface windows), --info-wkbd, --validate-wkbd
with --json variants. Validator catches id+actionName+
defaultKey required, category 0..8, alternateKey ==
defaultKey (no point in alt), action-name lowercase warning
(should be SCREAMING_SNAKE), duplicate primary keys (would
silently shadow earlier binding), and duplicate action names.

Format graph: 54 → 55 binary formats. CLI flag count: 791
→ 796.

tools/editor/cli_list_formats.cpp

@@ -79,6 +79,7 @@ constexpr FormatRow kFormats[] = {
     {"WGTP", ".wgtp",  "ui",        "GameTips.dbc + tutorial hints",    "Game tips / tutorial / loading-screen catalog"},
     {"WCMP", ".wcmp",  "pets",      "CreatureFamily + companion SQL",   "Companion / vanity pet catalog"},
     {"WSMC", ".wsmc",  "spells",    "SpellMechanic.dbc + DR tables",    "Spell mechanic / CC category catalog"},
+    {"WKBD", ".wkbd",  "input",     "KeyBinding.dbc + default binds",   "Default keybinding catalog"},
 
     // Additional pipeline catalogs without the alternating
     // gen/info/validate CLI surface (loaded by the engine