* feat: use images.AutoOrient in `helper/image`
closes https://github.com/CaiJimmy/hugo-theme-stack/issues/1292
* fix: check if IsImageResourceProcessable before using filter
* remove local field
* feat: add configurable image auto-orientation via a new `autoOrient` parameter in site configuration
* fix: keep external image url, and use reflect.IsImageResourceProcessable to check for svg
* build: update Hugo version to 0.157.0 in the build script.
* docs: remove `Local` return value and simplify `Resource` description in image helper
* Check for reflect.IsImageResourceProcessable before getting color from image
* chore: update minimum Hugo version to 0.157.0
* fix: add SVG check in helper/image before accessing .Width and .Height
* refactor: drop image resizing logic in render-image, and use helper/image to process image
* fix: render-image $permalink not correct
