Fix item use flag bit order to match client

The client's use flag name table (sb.exe 0x16C9728) has None at bit 0,
so USE_SELF is bit 1 through EMPTY_NEWITEM at bit 4. Names in the JSON
were one bit low.

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

mbEditorPro2.0/arcane/enums/arc_item.py

@@ -218,12 +218,13 @@ STRING_TO_ITEM_TYPE = {
     'REALMCHARTER': ITEM_TYPE_REALMCHARTER,
 }
 
-ITEM_USE_FLAGS_NONE = 0
-ITEM_USE_FLAGS_USE_SELF = 1 << 0
-ITEM_USE_FLAGS_USE_TARGET = 1 << 1
-ITEM_USE_FLAGS_EMPTY_DESTROY = 1 << 2
-ITEM_USE_FLAGS_EMPTY_NEWITEM = 1 << 3
-ITEM_USE_FLAGS_NUM = 4
+# Bit order from the client's use flag name table (sb.exe 0x16C9728)
+ITEM_USE_FLAGS_NONE = 1 << 0
+ITEM_USE_FLAGS_USE_SELF = 1 << 1
+ITEM_USE_FLAGS_USE_TARGET = 1 << 2
+ITEM_USE_FLAGS_EMPTY_DESTROY = 1 << 3
+ITEM_USE_FLAGS_EMPTY_NEWITEM = 1 << 4
+ITEM_USE_FLAGS_NUM = 5
 
 ITEM_USE_FLAGS_TO_STRING = {
     ITEM_USE_FLAGS_NONE: 'NONE',