Expose load_params

[Yuming-Lee24]

expose the load_params for both dynamics and control
modified the corresponding docs as well
added a unit test for dynamics param loading (for drone and controll are already covered in other tests)

[Yuming-Lee24]

also I have notices that:
in drone_env.py also miss using the control param loader to load params to load the thrust and does not consumed by any controller

match control_type:
        case Control.attitude:
            params = load_params(force_torque2rotor_vel, drone)
            thrust_min, thrust_max = params["thrust_min"] * 4, params["thrust_max"] * 4

modification is not included in this pr

[amacati]

Thanks! Can you change the drone_env.py as well? The code simplification would be good.

[amacati]

Looks all good, just waiting for the code simplification for the env