fix: correct formatting and add missing newlines in selector and EXAMPLE service

unshackle/core/utils/selector.py

@@ -1,10 +1,12 @@
 import sys
+
 import click
 from rich.console import Group
 from rich.live import Live
 from rich.padding import Padding
 from rich.table import Table
 from rich.text import Text
+
 from unshackle.core.console import console
 
 IS_WINDOWS = sys.platform == "win32"