Added menu management

src/myfasthtml/core/commands.py

@@ -85,10 +85,12 @@ class Command:
                args: list = None,
                kwargs: dict = None,
                key=None,
+               icon=None,
                auto_register=True):
     self.id = uuid.uuid4()
     self.name = name
     self.description = description
+    self.icon = icon
     self.owner = owner
     self.callback = callback
     self.default_args = args or []