home: create 'modules/home' folder

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

modules/home/atuin/default.nix

@@ -0,0 +1,31 @@
+{ config, lib, ... }:
+let
+  cfg = config.my.home.atuin;
+in
+{
+  options.my.home.atuin = with lib; {
+    enable = my.mkDisableOption "atuin configuration";
+  };
+
+  config = lib.mkIf cfg.enable {
+    programs.atuin = {
+      enable = true;
+
+      flags = [
+        # I *despise* this hijacking of the up key, even though I use Ctrl-p
+        "--disable-up-arrow"
+      ];
+
+      settings = {
+        # The package is managed by Nix
+        update_check = false;
+        # I don't care for the fancy display
+        style = "compact";
+        # Get closer to fzf's fuzzy search
+        search_mode = "skim";
+        # Show long command lines at the bottom
+        show_preview = true;
+      };
+    };
+  };
+}