Switch Item.template and MobLoot to CObjectTemplate

Item.template is now the cache template from CObjectTemplate.lookup
instead of the legacy DB ItemTemplate, so item.template.cacheTemplate.X
becomes item.template.X. MobLoot, LootManager, ItemManager.isTwoHanded/
isShield and CombatManager.getSwingAnimation take a CObjectTemplate.

No value changes: every getter already read the cache template through
the bridge, and the lookup resolves the same 7586 ids as
static_item_templates with the same item_type (offline parity p17.py,
0 differences).

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

src/engine/devcmd/cmds/PrintInventoryCmd.java

@@ -77,7 +77,7 @@ public class PrintInventoryCmd extends AbstractDevCmd {
         for (Item item : inventory) {
             ItemTemplate template = ItemTemplate.templates.get(item.templateID);
 
-            if (item.template.cacheTemplate.getItemType().equals(ItemType.GOLD) == false) {
+            if (item.template.getItemType().equals(ItemType.GOLD) == false) {
 
                 String chargeInfo = "";
                 int chargeMax = template.cacheTemplate.getItemInitialCharges();