Split [debian.sh] into multiple scripts inside a [debian] directory, adjusted references in other files to reflect changes

debian/network-interfaces.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -euo pipefail
+
+
+networkInterface=($(ip -br addr show | awk '!/^lo/&&!/tailscale/&&!/^wg/{print$1}'))
+shopt -s extglob
+
+for ((i = 0; i < ${#networkInterface[@]}; i++)); do
+	cat << EOF | tee /mnt/etc/network/interfaces.d/${networkInterface[$i]} &> /dev/null
+allow-hotplug	${networkInterface[$i]}
+iface		${networkInterface[$i]}	inet	dhcp
+EOF
+done