feat: install proton bridge and aerc for email

modules/home-manager/features/aerc.nix

@@ -0,0 +1,20 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  feature = "aerc";
+in
+{
+  config = lib.mkIf config.${feature}.enable {
+    programs.aerc = {
+      enable = true;
+      extraConfig.general.unsafe-accounts-conf = true;
+    };
+  };
+
+  imports = [ ];
+
+  options.${feature}.enable = lib.mkEnableOption "enables ${feature}";
+}