MIL-008: Choose level

Review record RC-041 (Go, autonomous mode, not independent).

Task: MIL-008#1
Task: MIL-008#2
Task: MIL-008#3
Task: MIL-008#4
Task: MIL-008#5
Task: MIL-008#6
Task: MIL-008#7
Task: MIL-008#8

src/flash_card/presentation/shared/window.py

@@ -0,0 +1,19 @@
+"""Window set-up shared by the screens.
+
+@file window.py
+@brief Gives the root window its title, padding and background.
+"""
+
+import tkinter as tk
+
+from flash_card.constants import BACKGROUND_COLOR, WINDOW_PADDING, WINDOW_TITLE
+
+
+def configure_window(root: tk.Tk) -> None:
+    """Set the title, padding and background of the window.
+
+    @param root The Tk root window.
+    @return Nothing.
+    """
+    root.title(WINDOW_TITLE)
+    root.config(padx=WINDOW_PADDING, pady=WINDOW_PADDING, bg=BACKGROUND_COLOR)