add mcpServers to llm (#89)

* add mcpServers to llm

* add testcase

---------

Co-authored-by: Quan HL <quan.luuhoang8@gmail.com>

test/jambonz-verb-test.js

@@ -522,6 +522,26 @@ test("validate correct verbs", async (t) => {
       },
       "dual_streams": true,
       "timeLimit" : 10
+    },
+    {
+      "verb": "llm",
+      "vendor": 'ultravox',
+      "model": 'fixie-ai/ultravox',
+      "auth": {
+        "apiKey": "sk-1234567890abcdefg"
+      },
+      "llmOptions": {
+        "firstSpeaker": 'FIRST_SPEAKER_AGENT',
+      },
+      "mcpServers": [
+        {
+          "url": 'https://mcp.example.com',
+          "auth": {
+            "username": 'username',
+            "password": 'password'
+          }
+        }
+      ]
     }
   ];
   try {