feat(editor): add WEMO (Emote Definition) — 101st open format

Novel replacement for the EmotesText.dbc + EmotesTextSound
+ EmotesTextData trio that maps /slash-emote commands
(/dance, /wave, /laugh, etc.) to their visible chat text,
animation ID, and per-race voice clip. Each entry binds
one slashCommand to an animationId (refs WANI), soundId
(refs WSND), targetMessage / noTargetMessage formats,
emote kind (Social / Combat / RolePlay / System), sex
filter (Both / Male / Female), required race bit, and a
TTS hint (Talk / Whisper / Yell / Silent) for accessibility
text-to-speech engines.

Three preset emitters covering the canonical emote
buckets: makeBasic (8 universal social emotes — wave /
bow / laugh / cheer / cry / sleep / kneel / applaud),
makeCombat (5 combat-themed — roar / threaten / charge /
victory / surrender), makeRolePlay (6 RP-focused — bonk
/ ponder / soothe / plead / shoo / scoff). Animation IDs
match AnimationData.dbc convention so existing WoW client
mods continue to play the right anims.

Validator catches authoring bugs unique to slash-command
parsing: leading '/' on slashCommand (chat parser strips
it before lookup so the entry would be doubly-prefixed),
uppercase letters (parser case-folds before lookup so the
entry is unreachable), duplicate slash commands (parser
dispatches by exact match — ambiguity would crash the
chat input handler), %s token counts that don't match
target/no-target distinction.

Also expanded --catalog-pluck's foreign-key filter to
include animationId / soundId / particleId / ribbonId /
vehicleId / seatId / currencyId / trainerId / vendorId /
mailTemplateId — caught during smoke-test where pluck
mis-identified WEMO entries by animationId instead of
emoteId. Same class of bug as the WHRT areaId fix.

Format count 100 -> 101. CLI flag count 1126 -> 1131.

tools/editor/cli_arg_required.cpp

@@ -310,6 +310,8 @@ const char* const kArgRequired[] = {
     "--gen-msp", "--gen-msp-cluster", "--gen-msp-multi",
     "--info-wmsp", "--validate-wmsp",
     "--export-wmsp-json", "--import-wmsp-json",
+    "--gen-emo", "--gen-emo-combat", "--gen-emo-rp",
+    "--info-wemo", "--validate-wemo",
     "--gen-weather-temperate", "--gen-weather-arctic",
     "--gen-weather-desert", "--gen-weather-stormy",
     "--gen-zone-atmosphere",