Add direct install helper print

[dltn]

Adds llamastack/llama-stack#404 to DirectClient:

$ python src/llama_stack_client/lib/direct/test.py <run.yaml>

Please install needed dependencies using the following commands:

        pip install blobfile scikit-learn transformers matplotlib lm-format-enforcer scipy tqdm accelerate nltk redis chardet torch torchvision zmq numpy sentencepiece faiss-cpu fairscale pillow pypdf psycopg2-binary pandas aiosqlite

[...]
ModuleNotFoundError: No module named 'aiosqlite'