home: create 'modules/home' folder

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

modules/home/bat/default.nix

@@ -0,0 +1,18 @@
+{ config, lib, ... }:
+let
+  cfg = config.my.home.bat;
+in
+{
+  options.my.home.bat = with lib; {
+    enable = my.mkDisableOption "bat configuration";
+  };
+
+  config.programs.bat = lib.mkIf cfg.enable {
+    enable = true;
+    config = {
+      theme = "gruvbox-dark";
+
+      pager = with config.home.sessionVariables; "${PAGER} ${LESS}";
+    };
+  };
+}