Refactor TTS provider management and enhance documentation

- Renamed `bundled-mlx` to `apple-mlx` for clarity in provider types.
- Updated the ProviderSettings component to reflect the new provider naming.
- Improved logging for provider startup and error handling in the backend.
- Added scripts for building and installing PyTorch CPU and CUDA providers locally.
- Enhanced the documentation to include details on TTS provider architecture and development setup.

providers/pytorch-cpu/build.py

@@ -61,7 +61,6 @@ def build_provider():
         '--exclude-module', 'torch.utils.tensorboard',
         '--exclude-module', 'tensorboard',
         '--exclude-module', 'triton',
-        '--exclude-module', 'torch.distributed',
         '--exclude-module', 'torch._dynamo',
         '--exclude-module', 'torch._inductor',
         '--exclude-module', 'torch.testing',