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>

home/yolo/monitors.nix

@@ -0,0 +1,11 @@
+_:
+{
+  # Hyprland 0.55+ is Lua-only (see home/common/programs/hyprland).
+  #
+  # Matches every output rather than naming one: the virtio-gpu connector name
+  # varies by qemu display backend (Virtual-1 vs Virtual-0). Explicit mode, not
+  # `preferred` — this is the resolution Sunshine streams.
+  wayland.windowManager.hyprland.extraConfig = ''
+    hl.monitor({ output = "", mode = "2560x1440@60", position = "0x0", scale = 1 })
+  '';
+}