Updated the environments as per the task requirements

environment.py

@@ -0,0 +1,16 @@
+from typing import Dict, Any, Tuple
+from models import Action, Observation, Reward
+
+
+class EmailSortingEnvironment:
+    def __init__(self) -> None:
+        pass
+
+    def reset(self, task_id: str = "email_classification") -> Observation:
+        pass
+
+    def step(self, action: Action) -> Tuple[Observation, Reward, bool, Dict]:
+        pass
+
+    def state(self) -> Dict[str, Any]:
+        pass