treewide: move nixos modules

modules/nixos/games/particles/default.nix

@@ -0,0 +1,24 @@
+{ config, lib, pkgs, ... }:
+
+let
+  particles = pkgs.fetchgit {
+    url = "https://git.zeus.gent/midgard/particles.git";
+    sha256 = "0weSBjhSS0XuII5yZXWYUJpPOhetFJKbcsS8WWpodhs=";
+  };
+in
+{
+  options.chvp.games.particles.server = lib.mkOption {
+    default = false;
+    example = true;
+  };
+
+  config = lib.mkIf config.chvp.games.particles.server {
+    chvp.services.nginx.hosts = [{
+      fqdn = "particles.vanpetegem.me";
+      options = {
+        root = "${particles}/public";
+        locations."/".index = "index.html";
+      };
+    }];
+  };
+}