feat: include tavily secret if available in requests (#18)

* feat: include tavily secret if available in requests

- without this change the secret must also be provided
  in the llama-stack environment which too me a little
  while to figure out
- makes it a bit more consistent with the python example in
  https://github.com/meta-llama/llama-stack-apps/blob/592a101c155082125d8f1170cf4824860a0fd921/examples/agents/hello.py#L24

Signed-off-by: Michael Dawson <[email protected]>

* squash: cleanup

---------

Signed-off-by: Michael Dawson <[email protected]>

Author: mhdawson

examples/agents.ts

@@ -2,8 +2,14 @@
 
 import { AgentConfig } from "llama-stack-client/resources/shared";
 
-import LlamaStackClient from 'llama-stack-client';
-const client = new LlamaStackClient({ baseURL: 'http://localhost:8321' });
+import { LlamaStackClient, ClientOptions } from 'llama-stack-client';
+
+const options: ClientOptions = { baseURL: 'http://localhost:8321' };
+if (process.env["TAVILY_SEARCH_API_KEY"]) {
+  const tavilyHeader = JSON.stringify({tavily_search_api_key: process.env["TAVILY_SEARCH_API_KEY"]});
+  options.defaultHeaders = { 'X-LlamaStack-Provider-Data': tavilyHeader  }
+}
+const client = new LlamaStackClient(options);
 
 async function main() {
   const availableModels = (await client.models.list())
@@ -80,4 +86,4 @@ async function main() {
 
 }
 
-main();
+main();