feat: replace all user-facing Russian strings with English

Empty Russian and Chinese locale files so English is used regardless
of client language. Translate all CustomGameEventManager error messages,
SendCustomMessage calls, and deck/card UI strings to English.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

scripts/vscripts/wavemanager.lua

@@ -1184,7 +1184,7 @@ function WaveManager.prototype.SpawnBossOnEnd(self, endSpawn, spawnPoints, homeP
     if selectedBossUnit ~= "" then
         CustomGameEventManager:Send_ServerToAllClients("boss_spawned", {bossName = selectedBossName, bossUnitName = selectedBossUnit})
         ____print(nil, ((((LOG_PREFIX .. " 👑 Выбран случайный босс: ") .. selectedBossUnit) .. " (") .. selectedBossName) .. ")")
-        GameRules:SendCustomMessage("<font color='#FF3333'>Босс вышел!</font>", 0, 0)
+        GameRules:SendCustomMessage("<font color='#FF3333'>Boss spawned!</font>", 0, 0)
     end
     do
         local i = 0