[Inference] Use huggingface_hub inference client for TGI adapter (#53)

* Use huggingface_hub inference client for TGI inference

* Update the default value for TGI URL

* Use InferenceClient.text_generation for TGI inference

* Fixes post-review and split TGI adapter into local and Inference Endpoints ones

* Update CLI reference and add typing

* Rename TGI Adapter class

* Use HfApi to get the namespace when not provide in the hf endpoint name

* Remove unecessary method argument

* Improve TGI adapter initialization condition

* Move helper into impl file + fix merging conflicts

llama_toolchain/inference/adapters/tgi/__init__.py

@@ -4,12 +4,21 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from llama_toolchain.core.datatypes import RemoteProviderConfig
+from .config import TGIImplConfig
+from .tgi import InferenceEndpointAdapter, TGIAdapter
 
 
-async def get_adapter_impl(config: RemoteProviderConfig, _deps):
-    from .tgi import TGIInferenceAdapter
+async def get_adapter_impl(config: TGIImplConfig, _deps):
+    assert isinstance(config, TGIImplConfig), f"Unexpected config type: {type(config)}"
+
+    if config.url is not None:
+        impl = TGIAdapter(config)
+    elif config.is_inference_endpoint():
+        impl = InferenceEndpointAdapter(config)
+    else:
+        raise ValueError(
+            "Invalid configuration. Specify either an URL or HF Inference Endpoint details (namespace and endpoint name)."
+        )
 
-    impl = TGIInferenceAdapter(config.url)
     await impl.initialize()
     return impl