feat: use mainGateway for idols-ai, rename defaultGateway to proxyGateway

lib/genKubeVirtGuestModule.nix

@@ -3,13 +3,11 @@
   hostName,
   networking,
   ...
-}:
-let
-  inherit (networking) defaultGateway defaultGateway6 nameservers;
+}: let
+  inherit (networking) proxyGateway proxyGateway6 nameservers;
   inherit (networking.hostsAddr.${hostName}) iface ipv4;
   ipv4WithMask = "${ipv4}/24";
-in
-{
+in {
   # supported file systems, so we can mount any removable disks with these filesystems
   boot.supportedFilesystems = [
     "ext4"
@@ -31,9 +29,9 @@ in
   systemd.network.enable = true;
 
   systemd.network.networks."10-${iface}" = {
-    matchConfig.Name = [ iface ];
+    matchConfig.Name = [iface];
     networkConfig = {
-      Address = [ ipv4WithMask ];
+      Address = [ipv4WithMask];
       DNS = nameservers;
       DHCP = "ipv6"; # enable DHCPv6 only, so we can get a GUA.
       IPv6AcceptRA = true; # for Stateless IPv6 Autoconfiguraton (SLAAC)
@@ -42,11 +40,11 @@ in
     routes = [
       {
         Destination = "0.0.0.0/0";
-        Gateway = defaultGateway;
+        Gateway = proxyGateway;
       }
       {
         Destination = "::/0";
-        Gateway = defaultGateway6;
+        Gateway = proxyGateway6;
         GatewayOnLink = true; # it's a gateway on local link.
       }
     ];