feat(displayManager): enable autoLogin and set defaultSession to i3

- Moved displayManager configuration to the top-level services attribute.
- Enabled autoLogin with user set to username.
- Set defaultSession to "none+i3".
- Enabled lightdm in the nested displayManager configuration.

fix(vmware): add necessary kernel modules for VMware

- Added "kvm" and "kvm_intel" to boot.kernelModules for better VMware support.

lib/nixos/configuration-desktop.nix

@@ -37,6 +37,14 @@ in {
   };
 
   services = {
+    displayManager = {
+      autoLogin = {
+        enable = true;
+        user = username;
+      };
+      defaultSession = "none+i3";
+    };
+
     picom.enable = true;
 
     twingate.enable = system == "x86_64-linux";
@@ -49,14 +57,7 @@ in {
         wallpaper.mode = "fill";
       };
 
-      displayManager = {
-        autoLogin = {
-          enable = true;
-          user = username;
-        };
-        defaultSession = "none+i3";
-        lightdm.enable = true;
-      };
+      displayManager.lightdm.enable = true;
 
       windowManager.i3 = {
         enable = true;

lib/nixos/hardware/vmware/x86_64-linux.nix

@@ -12,7 +12,7 @@
 
   boot.initrd.availableKernelModules = ["ata_piix" "mptspi" "uhci_hcd" "ehci_pci" "sd_mod" "sr_mod"];
   boot.initrd.kernelModules = [];
-  boot.kernelModules = [];
+  boot.kernelModules = ["kvm" "kvm_intel"];
   boot.extraModulePackages = [];
 
   fileSystems."/" = {