refactoring code

demo/dryvr_demo/origin_agent.py

demo/dryvr_demo/thermo_demo2.py

demo/tacas2023/exp3/exp3.py

setup.py

verse/analysis/simulator.py

verse/scenario/scenario.py

verse/sensor/base_sensor.py

verse/sensor/example_sensor/craft_sensor.py

verse/sensor/example_sensor/quadrotor_sensor.py

verse/sensor/example_sensor/single_sensor.py

verse/sensor/example_sensor/thermo_sensor.py