fix(network-manager): ensure wireguard endpoint routes via default gateway

system-config/NetworkManager/dispatcher.d/90-wireguard-nca-endpoint-route

@@ -0,0 +1,15 @@
+  #!/bin/sh
+
+   ENDPOINT=129.100.33.20
+
+   case "$2" in
+   up|dhcp4-change)
+       route=$(ip -4 route show default | awk 'NR==1')
+       gateway=$(echo "$route" | awk '{for (i=1;i<=NF;i++) if ($i=="via") print $(i+1)}')
+       device=$(echo "$route" | awk '{for (i=1;i<=NF;i++) if ($i=="dev") print $(i+1)}')
+
+       if [ -n "$gateway" ] && [ -n "$device" ]; then
+           ip -4 route replace "$ENDPOINT/32" via "$gateway" dev "$device"
+       fi
+       ;;
+   esac