feat: support HuggingFace model IDs for faster_whisper_custom_model_path

Previously, the server only accepted local file paths for custom Faster Whisper
models. This change allows passing HuggingFace repo IDs which are automatically
downloaded and converted to CTranslate2 format by the backend if not already in
CTranslate2 format.

Signed-off-by: makaveli10 <vineet.suryan@collabora.com>

whisper_live/server.py

@@ -414,7 +414,8 @@ class TranscriptionServer:
         self.cache_path = cache_path
         self.client_manager = ClientManager(max_clients, max_connection_time)
         if faster_whisper_custom_model_path is not None and not os.path.exists(faster_whisper_custom_model_path):
-            raise ValueError(f"Custom faster_whisper model '{faster_whisper_custom_model_path}' is not a valid path.")
+            if "/" not in faster_whisper_custom_model_path:
+                raise ValueError(f"Custom faster_whisper model '{faster_whisper_custom_model_path}' is not a valid path or HuggingFace model.")
         if whisper_tensorrt_path is not None and not os.path.exists(whisper_tensorrt_path):
             raise ValueError(f"TensorRT model '{whisper_tensorrt_path}' is not a valid path.")
         if single_model: