chore: update model names and gitea allowed-tools

- Use full model names (claude-haiku-4-5, etc.) in create-capability
- Add allowed-tools to gitea skill for tea/jq commands
- Set default model to opus in settings

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

settings.json

@@ -29,5 +29,6 @@
   },
   "enabledPlugins": {
     "gopls-lsp@claude-plugins-official": true
-  }
+  },
+  "model": "opus"
 }