Add Inspector and Classification base classes

mev_inspect/inspectors/base.py

@@ -0,0 +1,11 @@
+from abc import ABC, abstractmethod
+from typing import Optional
+
+from mev_inspect.schemas.blocks import NestedTrace
+from mev_inspect.schemas.classifications import Classification
+
+
+class Inspector(ABC):
+    @abstractmethod
+    def inspect(self, nested_trace: NestedTrace) -> Optional[Classification]:
+        pass

mev_inspect/schemas/classifications.py

@@ -0,0 +1,5 @@
+from pydantic import BaseModel
+
+
+class Classification(BaseModel):
+    pass