feat(bash): alias completions

modules/home/bash/complete-alias.nix

@@ -0,0 +1,16 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.sydnix.bash.complete-alias;
+in {
+  options.sydnix.bash.complete-alias = {
+    enable = lib.mkEnableOption "Alias completion";
+  };
+
+  config = lib.mkIf cfg.enable {
+    programs.bash.initExtra = lib.mkAfter ''
+      . ${lib.getExe pkgs.complete-alias}
+      complete -F _complete_alias "''${!BASH_ALIASES[@]}"
+    '';
+  };
+}