feat: add up in MCE manager

MCE/custom_widgets/ctk_add_button.py

@@ -0,0 +1,16 @@
+import customtkinter
+
+class CTkAddButton(customtkinter.CTkFrame):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.button = customtkinter.CTkButton(self, text="Add Down", corner_radius=0, width=120)
+        self.button.grid(row=0, column=0)
+        self.option_menu = customtkinter.CTkOptionMenu(
+            self, values= ["Add Up", "Add Down"], width=10, command=self.set_button, corner_radius=0
+            )
+        self.option_menu.set("")
+        self.option_menu.grid(row=0, column=1)
+
+    def set_button(self, value):
+        self.option_menu.set("")
+        self.button.configure(text=value)