change step format from part to assembly with details and shell_part

...odel/101_01_0_ost23_step_detail/101_01_0_ost23__out.log.1

...p_model/101_01_0_ost23_step_detail/101_01_0_ost23_top.stp

...1_01_0_ost23_step_detail/101_01_100_0_steering_module.stp

.../101_01_0_ost23_step_detail/101_01_101_0_steering_box.stp

.../101_01_0_ost23_step_detail/101_01_102_1_steering_box.stp

...01_01_0_ost23_step_detail/101_01_120_0_encoder_holder.stp

..._01_0_ost23_step_detail/101_01_121_0_encoder_mounting.stp

...1_01_0_ost23_step_detail/101_01_130_0_gear_motor_unit.stp

...101_01_0_ost23_step_detail/101_01_132_0_sealing_plate.stp

...1_01_0_ost23_step_detail/101_01_134_0_enc_ring_holder.stp

...101_01_0_ost23_step_detail/101_01_150_01_electric_box.stp

...01_01_0_ost23_step_detail/101_01_152_0_assembly_plate.stp

...01_01_0_ost23_step_detail/101_01_155_01_3dp_wall_left.stp

...1_01_0_ost23_step_detail/101_01_156_01_3dp_wall_right.stp

...el/101_01_0_ost23_step_detail/101_01_157_01_3dp_floor.stp

.../101_01_0_ost23_step_detail/101_01_200_0_drive_module.stp

...model/101_01_0_ost23_step_detail/101_01_210_drive_box.stp

...del/101_01_0_ost23_step_detail/101_01_211_1_drive_box.stp

...101_01_0_ost23_step_detail/101_01_212_0_bearing_cover.stp

...del/101_01_0_ost23_step_detail/101_01_213_0_box_cover.stp