chore: Stack server no longer depends on llama-stack-client (#4094)

This dependency has been bothering folks for a long time (cc @leseb). We
really needed it due to "library client" which is primarily used for our
tests and is not a part of the Stack server. Anyone who needs to use the
library client can certainly install `llama-stack-client` in their
environment to make that work.

Updated the notebook references to install `llama-stack-client`
additionally when setting things up.

docs/notebooks/Llama_Stack_Agent_Workflows.ipynb

@@ -37,7 +37,7 @@
    "outputs": [],
    "source": [
     "# NBVAL_SKIP\n",
-    "!pip install -U llama-stack\n",
+    "!pip install -U llama-stack llama-stack-client\n",
     "llama stack list-deps fireworks | xargs -L1 uv pip install\n"
    ]
   },

docs/notebooks/Llama_Stack_Benchmark_Evals.ipynb

@@ -44,7 +44,7 @@
    "outputs": [],
    "source": [
     "# NBVAL_SKIP\n",
-    "!pip install -U llama-stack"
+    "!pip install -U llama-stack llama-stack-client\n"
    ]
   },
   {

docs/notebooks/nvidia/beginner_e2e/Llama_Stack_NVIDIA_E2E_Flow.ipynb

@@ -74,6 +74,7 @@
    "source": [
     "```bash\n",
     "uv sync --extra dev\n",
+    "uv pip install -U llama-stack-client\n",
     "uv pip install -e .\n",
     "source .venv/bin/activate\n",
     "```"