Add player death handling, race-aware faction hostility, and all-race texture support

- Death screen with "Release Spirit" button sends CMSG_REPOP_REQUEST
- Detect player death/resurrection via health updates (VALUES and CREATE)
- Faction hostility map now built per-character race instead of hardcoded Human
- CharSections.dbc texture lookup enabled for all races (was Human-only)
- Fallback texture paths use race folder names instead of hardcoded Human
- Player name in unit frame is clickable for self-targeting

include/game/opcodes.hpp

@@ -164,6 +164,9 @@ enum class Opcode : uint16_t {
     SMSG_ITEM_QUERY_SINGLE_RESPONSE  = 0x058,
     CMSG_AUTOEQUIP_ITEM              = 0x10A,
     SMSG_INVENTORY_CHANGE_FAILURE    = 0x112,
+
+    // ---- Death/Respawn ----
+    CMSG_REPOP_REQUEST               = 0x015A,
 };
 
 } // namespace game