docs(willexecutors.py): Add module-level documentation

willexecutors.py

@@ -1,3 +1,15 @@
+"""
+Willexecutors module for BAL Electrum Plugin.
+
+This module provides functionality to manage will executor servers that
+broadcast timelocked transactions at the appropriate locktime.
+
+Main components:
+    - Willexecutors: Static class for managing executor list
+    - WillExecutor: Data class representing a single executor
+    - send_request: HTTP communication with executor servers
+"""
+
 import json
 from datetime import datetime
 import time