feat: use images.AutoOrient in helper/image (#1294)

* 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

layouts/rss.xml

@@ -50,7 +50,7 @@
                 {{- if .Site.Params.RSSFullContent -}}
                     {{- $content = .Content -}}
                 {{- end -}}
-                {{- $image := partial "helper/image" (dict "Image" .Params.image "Resources" .Resources) -}}
+                {{- $image := partial "helper/image" (dict "Image" .Params.image "Resources" .Resources "Context" .) -}}
                 {{- if $image -}}
                     {{- $imgTag := printf "<img src=\"%s\" alt=\"Featured image of post %s\" />" ($image.permalink | absURL) .Title -}}
                     {{- $content = printf "%s%s" $imgTag $content -}}