consolidate home-manager config to a module with one entrypoint

home/dconf/default.nix

@@ -0,0 +1,30 @@
+{ config, lib, pkgs, ... }:
+
+# dconf is the configuration manager for GNOME.
+
+# home-manager, in its infinite wisdom, sets `dconf.enable` to true by default.
+# This is a problem because we don't want it to attempt to apply our settings on
+# a system that doesn't actually have GNOME installed.
+
+# To work around it, we create our own option `qenya.dconf.enable`, which
+# defaults to false, and pass it to `dconf.enable`.
+
+let
+  inherit (lib) mkIf mkEnableOption;
+  cfg = config.qenya.dconf;
+in
+{
+  options.qenya.dconf = {
+    enable = mkEnableOption "dconf";
+  };
+
+  config = {
+    dconf.enable = config.qenya.dconf.enable;
+  };
+
+  imports = [
+    # TODO: nix-ify other parts of GNOME config
+    ./appearance.nix
+    ./keyboard.nix
+  ];
+}