Impliment layer abstract class

src/layer.py

@@ -0,0 +1,36 @@
+import numpy as np
+from abc import ABC, abstractmethod
+
+
+class Layer(ABC):
+    @abstractmethod
+    def forward(self, x: np.ndarray) -> np.ndarray:
+        """
+        x = inputs
+        if should_cache = True, 
+            additional caching will be done.
+            Set this to true and then call forward right before calling backward
+        """
+
+    @property
+    @abstractmethod
+    def parameters(self) -> tuple[np.ndarray, ...]:
+        """
+        Returns the different parameters.
+        The order is defined as per the sub class's convinience
+        """
+
+    @parameters.setter
+    @abstractmethod
+    def parameters(self, parameters: tuple[np.ndarray, ...]) -> None:
+        """
+        Write to parameters property
+        """
+
+    @abstractmethod
+    def d_output_wrt_parameters(self, inputs: np.ndarray) -> tuple[np.ndarray, ...]:
+        pass
+
+    @abstractmethod
+    def d_output_wrt_inputs(self) -> np.ndarray:
+        pass