Refactor back to a more modular configuration

modules/home-manager/cli/tmux-sessionizer.nix

@@ -0,0 +1,46 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+with lib;
+
+let
+  cfg = config.homeManagerModules.cli.tmux-sessionizer;
+in
+{
+  options.homeManagerModules.cli.tmux-sessionizer.enable = mkEnableOption "Enable tmux-sessionizer";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      tmux-sessionizer
+    ];
+
+    xdg.configFile."tmux-sessionizer/default".source = "${
+      pkgs.writeShellApplication {
+        name = ".tmux-sessionizer";
+
+        runtimeInputs = with pkgs; [
+          tmux
+        ];
+
+        text = ''
+          set +o errexit
+          set +o nounset
+
+          if [[ "$PWD" == "${config.xdg.userDirs.extraConfig.XDG_REPOS_DIR}/os" || "$PWD" == "${config.xdg.userDirs.extraConfig.XDG_REPOS_DIR}/personal" ]]; then
+            clear
+
+            return
+          fi
+
+          tmux new-window -d -n scratch
+          nvim .
+          clear
+        '';
+      }
+    }/bin/.tmux-sessionizer";
+  };
+}