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feat: Add tools page to playground (#1904)

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# What does this PR do?

This PR adds an additional page to the playground called "Tools". This
page connects to a llama-stack server and lists all the available LLM
models, builtin tools and MCP tools in the sidebar. Users can select
whatever combination of model and tools they want from the sidebar for
their agent. Once the selections are made, users can chat with their
agent similarly to the RAG page and test out agent tool use.

closes #1902 

## Test Plan

Ran the following commands with a llama-stack server and the updated
playground worked as expected.
```
export LLAMA_STACK_ENDPOINT="http://localhost:8321"     
streamlit run  llama_stack/distribution/ui/app.py
```

[//]: # (## Documentation)

Signed-off-by: Michael Clifford <mcliffor@redhat.com>
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Michael Clifford 2025-04-09 09:26:52 -04:00 • committed by GitHub
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llama_stack/distribution/ui/app.py
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@ -24,6 +24,7 @@ def main():
# Playground pages
chat_page = st.Page("page/playground/chat.py", title="Chat", icon="💬", default=True)
rag_page = st.Page("page/playground/rag.py", title="RAG", icon="💬", default=False)
tool_page = st.Page("page/playground/tools.py", title="Tools", icon="🛠", default=False)
# Distribution pages
resources_page = st.Page("page/distribution/resources.py", title="Resources", icon="🔍", default=False)
@ -39,6 +40,7 @@ def main():
"Playground": [
chat_page,
rag_page,
tool_page,
application_evaluation_page,
native_evaluation_page,
],