Revert "chore: remove manual catppuccin in favor of system wide configuration"

This reverts commit 1161933237.

programs/tmux/default.nix

@@ -4,5 +4,13 @@
   programs.tmux = {
     enable = true;
     clock24 = true;
+    plugins = with pkgs.tmuxPlugins; [
+      {
+        plugin = catppuccin;
+        extraConfig = ''
+          set -g @catppuccin_flavour 'frappe'
+        '';
+      }
+    ];
   };
 }