fix: async Warden PAGE_A/PAGE_B checks to prevent main-loop stalls

Move 5-second brute-force HMAC-SHA1 code pattern searches to a
background thread via std::async. The main loop now detects PAGE_A/B
checks, launches the response builder async, and drains the result
in update() — encrypting and sending on the main thread to keep
wardenCrypto_ RC4 state thread-safe.

Also adds Turtle WoW PE binary support (isTurtle flag, dedicated exe
search, runtime patches), searchCodePattern with result caching,
writeLE32 public API, and Warden scan entry verification.

include/game/game_handler.hpp

@@ -22,6 +22,7 @@
 #include <optional>
 #include <algorithm>
 #include <chrono>
+#include <future>
 
 namespace wowee::game {
     class TransportManager;
@@ -3144,6 +3145,10 @@ private:
     uint8_t wardenCheckOpcodes_[9] = {};
     bool loadWardenCRFile(const std::string& moduleHashHex);
 
+    // Async Warden response: avoids 5-second main-loop stalls from PAGE_A/PAGE_B code pattern searches
+    std::future<std::vector<uint8_t>> wardenPendingEncrypted_;  // encrypted response bytes
+    bool wardenResponsePending_ = false;
+
     // ---- XP tracking ----
     uint32_t playerXp_ = 0;
     uint32_t playerNextLevelXp_ = 0;