Your requirements could not be resolved to an installable set of packages.
Problem 1
- laravel/framework is present at version 11.x-dev and cannot be modified by Composer
- orchestra/testbench-core 10.x-dev conflicts with laravel/framework <12.0.0 || >=13.0.0.
- Root composer.json requires orchestra/testbench-core ^10.0 -> satisfiable by orchestra/testbench-core[10.x-dev].