Add base converter implementation with registry and adapt entrypoints/CLI to utilize it

Author: markurtz

src/speculators/__main__.py

@@ -136,7 +136,8 @@ def convert(
             --verifier "meta-llama/Llama-3.1-8B-Instruct"
 
         # eagle3 with normalization before the residual
-            --algorithm-kwargs '{"norm_before_residual": true}' \
+        speculators convert "./eaglev3/checkpoint" \
+            --algorithm-kwargs '{"norm_before_residual": true}'
             --verifier "meta-llama/Llama-3.1-8B-Instruct"
 
     :param model: Model checkpoint path or Hugging Face model ID to convert

src/speculators/convert/converters/base.py

@@ -30,7 +30,7 @@
 """Generic type variable for speculator models"""
 
 
-class SpeculatorConverter(ABC, RegistryMixin, Generic[ConfigT, ModelT]):
+class SpeculatorConverter(ABC, Generic[ConfigT, ModelT], RegistryMixin):
     """
     Abstract base converter for transforming external checkpoints to Speculators format.