feat: refactor home-manager configs

modules/home-manager/tmux/tmux.nix

@@ -0,0 +1,25 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.feature.tmux;
+in
+{
+  options.feature.tmux = {
+    enable = lib.mkEnableOption "Set up tmux";
+  };
+
+  config = lib.mkIf cfg.enable {
+    programs.tmux = {
+      enable = true;
+      baseIndex = 1;
+      plugins = with pkgs.tmuxPlugins; [
+        catppuccin
+      ];
+      extraConfig = builtins.readFile ./tmux.conf;
+    };
+  };
+}