docs: more comments

crossfit_booker.py

@@ -42,9 +42,19 @@ APP_VERSION = "5.09.21"
 
 
 class CrossFitBooker:
+    """
+    A class for automating the booking of CrossFit sessions.
+
+    This class handles authentication, session availability checking,
+    booking, and notifications for CrossFit sessions.
+    """
+
     def __init__(self) -> None:
         """
         Initialize the CrossFitBooker with necessary attributes.
+
+        Sets up authentication tokens, session headers, mandatory parameters,
+        and initializes the SessionNotifier for sending notifications.
         """
         self.auth_token: Optional[str] = None
         self.user_id: Optional[str] = None