add home manager configs

radish/home/custom-programs/default.nix

@@ -0,0 +1,10 @@
+{ ... }:
+let
+  inherit (builtins) attrNames filter readDir;
+  dirs =
+    let files = readDir ./.;
+    in filter (name: files."${name}" == "directory") (attrNames files);
+in
+{
+  imports = map (dir: ./${dir}) dirs;
+}