fix gradio new version

Update README.md

add Note

exp2.jpg ==> exp2.png

Merge branch 'main' of https://huggingface.co/spaces/Xiaolong-Wang/HC-Net into main

add Kitti example

delete server_port= in demo.launch()

update app.py

add requirement.txt

add get bev for front view image

Add application file

initial commit