refactor: move persistence into modules where possible

modules/programs/prismlauncher.nix

@@ -21,6 +21,10 @@ in
   options.my.programs.prismlauncher.enable = mkEnableOption "prismlauncher";
 
   config = mkIf cfg.enable {
+    environment.persistence."/persist".users.moritz.directories = [
+      ".local/share/PrismLauncher/"
+    ];
+
     users.users.moritz.packages = [ prismlauncher ];
   };
 }