Read item weight, value and base name through the bridge

Consumers of the legacy ItemTemplate item_wt, item_value and
item_base_name now read getItemWt(), getItemValue() and
getItemBaseName() on template.cacheTemplate.

Parity (offline, scripts/p14.py, 7586 templates): 0 differences in
item_wt, item_value and item_base_name. No value changes expected.

JSON-Refactor-Plan Task 1.4.

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

src/engine/devcmd/cmds/CreateItemCmd.java

@@ -51,7 +51,7 @@ public class CreateItemCmd extends AbstractDevCmd {
 
         for (int i = 0; i < size; i++) {
 
-            if (!playerCharacter.charItemManager.hasRoomInventory(template.item_wt)) {
+            if (!playerCharacter.charItemManager.hasRoomInventory(template.cacheTemplate.getItemWt())) {
                 ChatManager.chatSystemInfo(playerCharacter, "You are encumbered!.");
                 break;
             }