AVA2 unlock P4: sash (mt_sash windows/slot/tooltips, sash module, CHR_EQUIPPART_SASH, item_scale)

Client side of metin2-server FEATURE-AVA2-UNLOCK P4: HEADER_CG_SASH 211 /
HEADER_GC_SASH 215, a fifth awPart WORD in the character packets (old
servers break), the sash part attached by scale per job/sex, the combine
and absorb windows in script mt_sash, and quest tools/server/sash on 20016.
The ava2items pack keeps the four grade-4 sashes plus their effects,
acce window images and item_scale.txt.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/platform/ScriptLib/PythonBoot.cpp

@@ -37,6 +37,7 @@
 #include "UserInterface/PythonQuest.h"
 #include "UserInterface/PythonMessenger.h"
 #include "UserInterface/PythonSafeBox.h"
+#include "UserInterface/PythonSash.h"
 #include "UserInterface/PythonGuild.h"
 #include "UserInterface/MarkManager.h"
 #include "UserInterface/GuildMarkDownloader.h"
@@ -153,6 +154,7 @@ struct GameSingletons
 	CPythonQuest pyQuest;
 	CPythonMessenger pyManager;
 	CPythonSafeBox pySafeBox;
+	CPythonSash pySash; // PORT: AVA2 sash
 	CPythonGuild pyGuild;
 	CGuildMarkManager kGuildMarkManager;
 	CGuildMarkDownloader kGuildMarkDownloader;
@@ -911,6 +913,7 @@ bool run_main_script_body(const char* lpCmdLine, std::string* error)
 	initBackground();
 	initMessenger();
 	initsafebox();
+	initSash();
 	initguild();
 	initServerStateChecker();
 	initRenderTarget(); // PORT: AVA2 model preview
@@ -1013,6 +1016,7 @@ namespace PythonBoot
 #include "BattlePassScript.inc"
 #include "AppliesScript.inc"
 #include "ArmorShapesScript.inc"
+#include "SashScript.inc"
 
 static void install_script_module(const char* c_szModule, const char* c_szScript)
 {
@@ -1097,6 +1101,7 @@ bool RunMainScript(const char* lpCmdLine, std::string* error)
 		install_script_module("mt_battlepass", c_szBattlePassScript);
 		install_script_module("mt_applies", c_szAppliesScript);
 		install_script_module("mt_shapes", c_szArmorShapesScript);
+		install_script_module("mt_sash", c_szSashScript);
 		if (g_touch_input)
 			install_script_module("mt_mobile_hud", c_szMobileHUDScript);
 	}