tools/image-convert-scale-bun/requirement.md

1. this is a bun project
2. read document https://bun.com/docs/runtime/image
3. load images including (heic,jpeg, png and other formats)
4. convert to jpeg or png file(user can assign the format, default jpeg)
5. user can 等比例 scale image, user can assign width or height
6. user can assign one or multiple images one time