feat(ops/nixos/nugget): Add module for v4l2loopback support

This kernel module creates a fake video input device to which I can
stream various things, such as screen grabs or qyliss' video stream
for TVL.

ops/nixos/modules/v4l2loopback.nix

@@ -0,0 +1,12 @@
+{ config, lib, pkgs, ... }:
+
+{
+  boot = {
+    extraModulePackages = [ config.boot.kernelPackages.v4l2loopback ];
+    kernelModules = [ "v4l2loopback" ];
+    extraModprobeConfig = ''
+      options v4l2loopback exclusive_caps=1
+    '';
+  };
+}
+

ops/nixos/nugget/default.nix

@@ -16,6 +16,7 @@ config: let
 in depot.lib.fix(self: {
   imports = [
     ../modules/tailscale.nix
+    ../modules/v4l2loopback.nix
   ];
 
   hardware = {