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_format_table.cpp

@@ -57,6 +57,7 @@ constexpr FormatMagicEntry kFormats[] = {
     {{'W','G','T','P'}, ".wgtp",  "ui",        "--info-wgtp",      "Game tips / tutorial catalog"},
     {{'W','C','M','P'}, ".wcmp",  "pets",      "--info-wcmp",      "Companion / vanity pet catalog"},
     {{'W','S','M','C'}, ".wsmc",  "spells",    "--info-wsmc",      "Spell mechanic catalog"},
+    {{'W','K','B','D'}, ".wkbd",  "input",     "--info-wkbd",      "Keybinding 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"},