home: create 'modules/home' folder

Consolidating all modules under the same path, to clear out the
top-level directory.

modules/home/packages/default.nix

@@ -0,0 +1,26 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.my.home.packages;
+in
+{
+  options.my.home.packages = with lib; {
+    enable = my.mkDisableOption "user packages";
+
+    additionalPackages = mkOption {
+      type = with types; listOf package;
+      default = [ ];
+      example = literalExample ''
+        with pkgs; [
+          quasselClient
+        ]
+      '';
+    };
+  };
+
+  config.home.packages = with pkgs; lib.mkIf cfg.enable ([
+    fd
+    file
+    mosh
+    ripgrep
+  ] ++ cfg.additionalPackages);
+}