refactor: reorganize discoverer modules

src/modules/discoverers.default-discoverer/default.nix

@@ -0,0 +1,3 @@
+{
+  imports = [./implementation.nix];
+}

src/modules/discoverers/default.nix

@@ -2,6 +2,5 @@
   imports = [
     ./interface.nix
     ./implementation.nix
-    ./default-discoverer.nix
   ];
 }

src/modules/discoverers/interface.nix

@@ -8,7 +8,7 @@ in {
   options = {
     discoverers = lib.mkOption {
       type = t.attrsOf (t.submoduleWith {
-        modules = [./discoverer/default.nix];
+        modules = [../interfaces.discoverer];
         inherit specialArgs;
       });
       description = ''

src/modules/top-level.nix

@@ -12,6 +12,7 @@ in {
     ./translators
     ./builders
     ./discoverers
+    ./discoverers.default-discoverer
   ];
   options = {
     lib = lib.mkOption {