Update Cfg and add proxy/wsl

modules/shared/syscfg/extra.nix

@@ -0,0 +1,11 @@
+{ lib,... }:
+with lib; {
+    wsl = mkOption { type = types.bool; default = false; };
+    hosts = mkOption { type = types.listOf (types.str); default = []; };
+    proxy = {
+        domain = mkOption { type = types.str; default = ""; };
+        port = mkOption { type = types.str; default = ""; };
+        noProxy = mkOption { type = types.str; default = ""; };
+        cert = mkOption { type = types.path; default = null; };
+    };
+}