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/gameManager/ChatManager.java

@@ -540,7 +540,7 @@ public enum ChatManager {
                 else {
                     String vowels = "aeiou";
                     ItemTemplate template = ItemTemplate.templates.get(item.templateID);
-                    String iName = template.item_base_name;
+                    String iName = template.cacheTemplate.getItemBaseName();
                     if (iName.length() > 0)
                         if (vowels.indexOf(iName.substring(0, 1).toLowerCase()) >= 0)
                             name = "an " + iName + ' ';