Vanilla/Turtle WoW support: M2 loading, bone parsing, textures, auth

- Vanilla M2 bone struct (108 bytes) with 28-byte animation tracks
- Version-aware bone parsing (vanilla vs WotLK format detection)
- Fix CharSections.dbc field layout for vanilla (variation/color at 4-5)
- Remove broken CharSections.csv files (all fields marked as strings)
- Expansion data reload on profile switch (DBC cache clear, layout reload)
- Vanilla packet encryption (VanillaCrypt XOR-based header crypt)
- Extended character preview geoset range (0-99) for vanilla models
- DBC cache clear support in AssetManager

src/auth/auth_handler.cpp

@@ -369,7 +369,7 @@ void AuthHandler::handleRealmListResponse(network::Packet& packet) {
     LOG_DEBUG("Handling REALM_LIST response");
 
     RealmListResponse response;
-    if (!RealmListResponseParser::parse(packet, response)) {
+    if (!RealmListResponseParser::parse(packet, response, clientInfo.protocolVersion)) {
         LOG_ERROR("Failed to parse REALM_LIST response");
         return;
     }