prototype: use pyproject and uv to build distribution

Goals:

* remove the need of a custom tool to install a collection of python
  packages AKA `llama stack build`
* use the power of 'uv', which was designed to manage dependencies
* `llama stack build` can "probably" go away and be replaced with uv

Howto, with the pyproject, you can install an Ollama distribution in a
virtual env like so:

```
uv venv --python 3.10 ollama-distro
source ollama-distro/bin/activate
uv sync --extra ollama
llama stack run llama_stack/templates/ollama/run.yaml
```

Caveats:

* external provider, we could still use a build file or add
the known external providers to the pyproject?
* growth of the uv.lock?

We create a requirements.txt for convenience as some users are most
familiar with this format than looking at pyproject.

Signed-off-by: Sébastien Han <seb@redhat.com>

requirements-ollama.txt

@@ -0,0 +1,159 @@
+# This file was autogenerated by uv via the following command:
+#    uv export --frozen --no-hashes --no-emit-project --output-file=requirements-ollama.txt --no-annotate --no-default-groups --extra ollama
+accelerate==1.7.0
+aiohappyeyeballs==2.5.0
+aiohttp==3.11.13
+aiosignal==1.3.2
+aiosqlite==0.21.0
+annotated-types==0.7.0
+anyio==4.8.0
+async-timeout==5.0.1 ; python_full_version < '3.11.3'
+attrs==25.1.0
+autoevals==0.0.122
+backoff==2.2.1
+braintrust-core==0.0.58
+certifi==2025.1.31
+chardet==5.2.0
+charset-normalizer==3.4.1
+chevron==0.14.0
+chromadb-client==1.0.12
+click==8.1.8
+colorama==0.4.6 ; sys_platform == 'win32'
+contourpy==1.3.2
+cycler==0.12.1
+datasets==3.3.2
+deprecated==1.2.18
+dill==0.3.8
+distro==1.9.0
+dnspython==2.7.0
+ecdsa==0.19.1
+emoji==2.14.1
+exceptiongroup==1.2.2 ; python_full_version < '3.11'
+faiss-cpu==1.11.0
+fastapi==0.115.8
+filelock==3.17.0
+fire==0.7.0
+fonttools==4.58.1
+frozenlist==1.5.0
+fsspec==2024.12.0
+googleapis-common-protos==1.67.0
+greenlet==3.2.2
+grpcio==1.71.0
+h11==0.16.0
+hf-xet==1.1.2 ; (platform_machine == 'aarch64' and sys_platform != 'darwin') or (platform_machine == 'amd64' and sys_platform != 'darwin') or (platform_machine == 'arm64' and sys_platform != 'darwin') or (platform_machine == 'x86_64' and sys_platform != 'darwin')
+httpcore==1.0.9
+httpx==0.28.1
+httpx-sse==0.4.0
+huggingface-hub==0.29.0 ; sys_platform == 'darwin'
+huggingface-hub==0.32.3 ; sys_platform != 'darwin'
+idna==3.10
+importlib-metadata==8.0.0 ; sys_platform != 'darwin'
+importlib-metadata==8.5.0 ; sys_platform == 'darwin'
+jinja2==3.1.6
+jiter==0.8.2
+joblib==1.5.1
+jsonschema==4.23.0
+jsonschema-specifications==2024.10.1
+kiwisolver==1.4.8
+langdetect==1.0.9
+levenshtein==0.27.1
+llama-stack-client==0.2.9
+markdown-it-py==3.0.0
+markupsafe==3.0.2
+matplotlib==3.10.3
+mcp==1.3.0
+mdurl==0.1.2
+mpmath==1.3.0
+multidict==6.1.0
+multiprocess==0.70.16
+networkx==3.4.2
+nltk==3.9.1
+numpy==1.26.4
+ollama==0.5.1
+openai==1.71.0
+opentelemetry-api==1.26.0 ; sys_platform != 'darwin'
+opentelemetry-api==1.30.0 ; sys_platform == 'darwin'
+opentelemetry-exporter-otlp-proto-common==1.26.0 ; sys_platform != 'darwin'
+opentelemetry-exporter-otlp-proto-common==1.30.0 ; sys_platform == 'darwin'
+opentelemetry-exporter-otlp-proto-grpc==1.26.0 ; sys_platform != 'darwin'
+opentelemetry-exporter-otlp-proto-grpc==1.30.0 ; sys_platform == 'darwin'
+opentelemetry-exporter-otlp-proto-http==1.26.0 ; sys_platform != 'darwin'
+opentelemetry-exporter-otlp-proto-http==1.30.0 ; sys_platform == 'darwin'
+opentelemetry-proto==1.26.0 ; sys_platform != 'darwin'
+opentelemetry-proto==1.30.0 ; sys_platform == 'darwin'
+opentelemetry-sdk==1.26.0 ; sys_platform != 'darwin'
+opentelemetry-sdk==1.30.0 ; sys_platform == 'darwin'
+opentelemetry-semantic-conventions==0.47b0 ; sys_platform != 'darwin'
+opentelemetry-semantic-conventions==0.51b0 ; sys_platform == 'darwin'
+orjson==3.10.18
+overrides==7.7.0
+packaging==24.2
+pandas==2.1.4
+peft==0.15.2
+pillow==11.1.0
+posthog==4.2.0
+prompt-toolkit==3.0.50
+propcache==0.3.0
+protobuf==4.25.8 ; sys_platform != 'darwin'
+protobuf==5.29.3 ; sys_platform == 'darwin'
+psutil==7.0.0
+psycopg2-binary==2.9.10
+pyaml==25.1.0
+pyarrow==19.0.1
+pyasn1==0.4.8
+pydantic==2.10.6
+pydantic-core==2.27.2
+pydantic-settings==2.8.1
+pygments==2.19.1
+pymongo==4.13.0
+pyparsing==3.2.3
+pypdf==5.3.1
+pythainlp==5.1.2
+python-dateutil==2.9.0.post0
+python-dotenv==1.0.1
+python-jose==3.4.0
+python-multipart==0.0.20
+pytz==2025.1
+pyyaml==6.0.2
+rapidfuzz==3.12.2
+redis==6.2.0
+referencing==0.36.2
+regex==2024.11.6
+requests==2.32.2 ; (python_full_version < '3.11' and sys_platform == 'darwin') or (python_full_version >= '3.11' and sys_platform == 'linux') or (platform_machine != 'aarch64' and sys_platform == 'linux') or (sys_platform != 'darwin' and sys_platform != 'linux')
+requests==2.32.3 ; (python_full_version < '3.11' and platform_machine == 'aarch64' and sys_platform == 'linux') or (python_full_version >= '3.11' and sys_platform == 'darwin')
+rich==13.9.4
+rpds-py==0.22.3
+rsa==4.9
+safetensors==0.5.3
+scikit-learn==1.6.1
+scipy==1.15.3
+sentencepiece==0.2.0
+setuptools==80.8.0
+six==1.17.0
+sniffio==1.3.1
+sqlalchemy==2.0.41
+sse-starlette==2.2.1
+starlette==0.45.3
+sympy==1.13.1
+tenacity==9.1.2
+termcolor==2.5.0
+threadpoolctl==3.6.0
+tiktoken==0.9.0
+tokenizers==0.21.1
+torch==2.6.0 ; sys_platform == 'darwin'
+torch==2.6.0+cpu ; sys_platform != 'darwin'
+tqdm==4.67.1
+transformers==4.50.3 ; sys_platform == 'darwin'
+transformers==4.52.4 ; sys_platform != 'darwin'
+tree-sitter==0.24.0
+trl==0.18.1
+typing-extensions==4.12.2
+tzdata==2025.1
+urllib3==2.1.0 ; (python_full_version < '3.11' and platform_machine == 'aarch64' and sys_platform == 'linux') or (python_full_version >= '3.11' and sys_platform == 'darwin')
+urllib3==2.3.0 ; (python_full_version < '3.11' and sys_platform == 'darwin') or (python_full_version >= '3.11' and sys_platform == 'linux') or (platform_machine != 'aarch64' and sys_platform == 'linux') or (sys_platform != 'darwin' and sys_platform != 'linux')
+uvicorn==0.34.0
+wcwidth==0.2.13
+wrapt==1.17.2
+xxhash==3.5.0
+yarl==1.18.3
+zipp==3.21.0