[Feature] Add support for RAG evaluation (#1154)

Co-authored-by: Deven Patel <deven298@yahoo.com>
Co-authored-by: Deshraj Yadav <deshrajdry@gmail.com>

embedchain/eval/base.py

@@ -0,0 +1,29 @@
+from abc import ABC, abstractmethod
+
+from embedchain.utils.eval import EvalData
+
+
+class BaseMetric(ABC):
+    """Base class for a metric.
+
+    This class provides a common interface for all metrics.
+    """
+
+    def __init__(self, name: str = "base_metric"):
+        """
+        Initialize the BaseMetric.
+        """
+        self.name = name
+
+    @abstractmethod
+    def evaluate(self, dataset: list[EvalData]):
+        """
+        Abstract method to evaluate the dataset.
+
+        This method should be implemented by subclasses to perform the actual
+        evaluation on the dataset.
+
+        :param dataset: dataset to evaluate
+        :type dataset: list[EvalData]
+        """
+        raise NotImplementedError()