validate network name

Author: mplsgrant

src/warnet/main.py

@@ -115,7 +115,8 @@ def quickstart():
         # Custom network configuration
         questions = [
             inquirer.Text(
-                "network_name", message=click.style("Enter your network name", fg="blue", bold=True)
+                "network_name", message=click.style("Enter your network name", fg="blue", bold=True),
+                validate=lambda _, x: len(x) > 0
             ),
             inquirer.List(
                 "nodes",