treewide: flatten single file modules

Some files don't need nesting and can be root level again to reduce
conflicts with other PRs.

Signed-off-by: Austin Horstman <khaneliman12@gmail.com>

modules/services/xembed-sni-proxy.nix

@@ -0,0 +1,49 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+
+  cfg = config.services.xembed-sni-proxy;
+
+in
+{
+  meta.maintainers = [ lib.maintainers.rycee ];
+
+  options = {
+    services.xembed-sni-proxy = {
+      enable = lib.mkEnableOption "XEmbed SNI Proxy";
+
+      package = lib.mkPackageOption pkgs.kdePackages "plasma-workspace" {
+        pkgsText = "pkgs.kdePackages";
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions = [
+      (lib.hm.assertions.assertPlatform "services.xembed-sni-proxy" pkgs lib.platforms.linux)
+    ];
+
+    systemd.user.services.xembed-sni-proxy = {
+      Unit = {
+        Description = "XEmbed SNI Proxy";
+        After = [ "graphical-session.target" ];
+        PartOf = [ "graphical-session.target" ];
+      };
+
+      Install = {
+        WantedBy = [ "graphical-session.target" ];
+      };
+
+      Service = {
+        Environment = [ "PATH=${config.home.profileDirectory}/bin" ];
+        ExecStart = "${cfg.package}/bin/xembedsniproxy";
+        Restart = "on-abort";
+      };
+    };
+  };
+}