move out some common host settings to hosts/common.nix

modules/mods/kb-input.nix

@@ -0,0 +1,42 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}: let
+  cfg = config.mods.kb-input;
+in {
+  options = {
+    mods.kb-input = {
+      enable = lib.mkEnableOption "input method and custom keyboard layout";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.xserver.xkb.extraLayouts = {
+      minimak-4 = {
+        description = "English (US, Minimak-4)";
+        languages = [ "eng" ];
+        symbolsFile = ./minimak;
+      };
+      minimak-8 = {
+        description = "English (US, Minimak-8)";
+        languages = [ "eng" ];
+        symbolsFile = ./minimak;
+      };
+      minimak-12 = {
+        description = "English (US, Minimak-12)";
+        languages = [ "eng" ];
+        symbolsFile = ./minimak;
+      };
+    };
+
+    i18n.inputMethod = {
+      type = "fcitx5";
+      enable = true;
+      fcitx5.waylandFrontend = true;
+      fcitx5.plasma6Support = true;
+      fcitx5.addons = [ pkgs.fcitx5-mozc ];
+    };
+  };
+}