modules/plugins: add colorschemes by-name support

modules/plugins.nix

@@ -2,15 +2,21 @@
 let
   inherit (builtins) readDir;
   inherit (lib.attrsets) foldlAttrs;
-  inherit (lib.lists) optional;
+  inherit (lib.lists) optional concatMap;
-  by-name = ../plugins/by-name;
+
+  mkByName =
+    dir:
+    foldlAttrs (
+      prev: name: type:
+      prev ++ optional (type == "directory") (dir + "/${name}")
+    ) [ ] (readDir dir);
 in
 {
   imports = [
     ../plugins
   ]
-  ++ foldlAttrs (
+  ++ concatMap mkByName [
-    prev: name: type:
+    ../colorschemes
-    prev ++ optional (type == "directory") (by-name + "/${name}")
+    ../plugins/by-name
-  ) [ ] (readDir by-name);
+  ];
 }