Update NVIDIA NIM and Riva services to Nvidia

- pip install pipecat-ai[nim]
- pip install pipecat-ai[riva]

+ pip install pipecat-ai[nvidia]

and

- from pipecat.services.nim.llm import NimLLMService
+ from pipecat.services.nvidia.llm import NvidiaLLMService

- from pipecat.services.riva.stt import RivaSTTService
+ from pipecat.services.nvidia.stt import NvidiaSTTService

- from pipecat.services.riva.tts import RivaTTSService
+ from pipecat.services.nvidia.tts import NvidiaTTSService

pyproject.toml

@@ -94,6 +94,7 @@ qwen = []
 remote-smart-turn = []
 rime = [ "pipecat-ai[websockets-base]" ]
 riva = [ "nvidia-riva-client~=2.21.1" ]
+nvidia = [ "nvidia-riva-client~=2.21.1" ]
 runner = [ "python-dotenv>=1.0.0,<2.0.0", "uvicorn>=0.32.0,<1.0.0", "fastapi>=0.115.6,<0.122.0", "pipecat-ai-small-webrtc-prebuilt>=1.0.0"]
 sagemaker = ["aws_sdk_sagemaker_runtime_http2; python_version>='3.12'"]
 sambanova = []