refactor(modules): rewrite some modules; add dconf

hosts/shared/aliases.nix

@@ -1,10 +1,20 @@
-{pkgs, ...}: let
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}: let
   ezaOptions = "--colour=always --icons=never --group-directories-first --octal-permissions";
+  cfg = config.alqueva.shells.aliases;
 in {
-  config = {
+  options.alqueva.shells.aliases = {
+    enable = (lib.mkEnableOption "default aliases") // {default = true;};
+  };
+  config = lib.mkIf cfg.enable {
     environment = {
       shellAliases = builtins.mapAttrs (_: v: "${v} ${ezaOptions}") {
         l = "eza -alh";
+        la = "eza -ah";
         ls = "eza";
         ll = "eza -l";
       };