feat: add yolo host

New NixOS VM on proxmox, replacing the Ubuntu box. Reuses the existing
Hyprland config; remote access is Sunshine/Moonlight rather than xrdp,
since xrdp cannot drive a wayland compositor.

Two fixes here are not yolo-specific and affect any fresh install:
git at system level (nix needs it for the type = "git" hyprland input,
but git only came from home-manager, so neither rebuild could run), and
dropping the yogurt input, whose private repo made home-manager
un-evaluatable without GitHub auth.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

hosts/yolo/hardware-configuration.nix

@@ -0,0 +1,52 @@
+{
+  config,
+  lib,
+  modulesPath,
+  ...
+}:
+
+# Proxmox guest (VM 132), q35 + OVMF. Hand-written rather than generated:
+# filesystems are matched by label, set when the disk is partitioned, so this
+# stays valid if the VM is ever rebuilt from scratch.
+{
+  imports = [
+    (modulesPath + "/profiles/qemu-guest.nix")
+  ];
+
+  boot = {
+    initrd.availableKernelModules = [
+      "ahci"
+      "xhci_pci"
+      "virtio_pci"
+      "virtio_scsi"
+      "sd_mod"
+      "sr_mod"
+    ];
+    # In the initrd, not kernelModules: otherwise there is no DRM device until
+    # late boot and SDDM races it.
+    initrd.kernelModules = [ "virtio_gpu" ];
+    kernelModules = [ "kvm-intel" ];
+    extraModulePackages = [ ];
+  };
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-label/nixos";
+    fsType = "ext4";
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-label/BOOT";
+    fsType = "vfat";
+    options = [
+      "fmask=0077"
+      "dmask=0077"
+    ];
+  };
+
+  swapDevices = [ { device = "/dev/disk/by-label/swap"; } ];
+
+  networking.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}