fix: resolve conflicting module options

Apparently you aren't allowed to define the same option in multiple
modules, even if the definitions are identical.

modules/forgejo/options.nix

@@ -1,13 +1,8 @@
 args@{ config, lib, ... }:
 {
-  options.aether = {
-    # Referenced general options
-    inherit (import ../options.nix args)
-      domain
-      https
-      acmeEmail;
+  imports = [ ../options.nix ];
 
-    # Module-specific options
+  options.aether = {
     forgejo = {
       subdomain = lib.mkOption {
         type = lib.types.nullOr lib.types.str;