refactor: migrate all config paths to ~/.mytoolkit with MYTOOLKIT_HOME support

bin/commands/mail.py

@@ -3,6 +3,7 @@
 import base64
 import imaplib
 import json
+import os
 import re
 import smtplib
 from datetime import datetime
@@ -16,7 +17,8 @@ import click
 
 from bin.utils import handle_errors
 
-CONFIG_PATH = Path.home() / ".config" / "mytoolkit" / "mail.json"
+_HOME = Path(os.environ.get("MYTOOLKIT_HOME", Path.home() / ".mytoolkit"))
+CONFIG_PATH = _HOME / "mail.json"
 
 
 def load_config():