Remove stale riva mock imports from autodoc_mock_imports since the riva
service was removed and nvidia-riva-client is installed during doc builds.
Add pipecat.turns and pipecat.extensions to import_core_modules() and
add Turns to the index.rst toctree. Regenerate uv.lock to reflect the
riva extra removal from pyproject.toml.
* Adds pipecat.runner.run - FastAPI-based development server with automatic bot discovery
* Adds new RunnerArguments types for different transports
* Adds new runner utils for creating transports and parsing data
* Adds new Daily and LiveKit utils for setup
