refactor: image handling logic + support for external images (#1235)

* refactor: simplify image partial logic, remove generation of different image sizes

* Remove `defaultImage.opengraph` configuration from `params.toml`.

layouts/_partials/article-list/tile.html

@@ -1,33 +1,11 @@
-{{ $image := partialCached "helper/image" (dict "Context" .context "Type" .Type) .context.RelPermalink .Type }}
-<article class="{{ if $image.exists }}has-image{{ end }}">
+{{ $image := partial "helper/image" (dict "Image" .context.Params.image "Resources" .context.Resources) }}
+<article class="{{ if $image }}has-image{{ end }}">
     <a href="{{ .context.RelPermalink }}">
-        
-        {{ if $image.exists }}
-            <div class="article-image">
-                {{ if $image.resource }}
-                    {{- $imageRaw := $image.resource | resources.Fingerprint "md5" -}}
-                    {{- $Permalink := $imageRaw.RelPermalink -}}
-                    {{- $Width := $imageRaw.Width -}}
-                    {{- $Height := $imageRaw.Height -}}
-
-                    {{- if .context.Site.Params.imageProcessing.cover.enabled -}}
-                        {{- $thumbnail := $imageRaw.Fill .size -}}
-                        {{- $Permalink = $thumbnail.RelPermalink -}}
-                        {{- $Width = $thumbnail.Width -}}
-                        {{- $Height = $thumbnail.Height -}}
-                    {{- end -}}
-                    
-                    <img src="{{ $Permalink }}" 
-                        width="{{ $Width }}" 
-                        height="{{ $Height }}" 
-                        loading="lazy"
-                        alt="Featured image of post {{ .context.Title }}"
-                        {{ with .context.Slug }}data-key="{{ . }}" {{ end }}
-                        data-hash="{{ $imageRaw.Data.Integrity }}">
-                {{ else }}
-                    <img src="{{ $image.permalink }}" loading="lazy" data-key="{{ .context.Slug }}" data-hash="{{ $image.permalink }}"/>
-                {{ end }}
-            </div>
+        {{ if $image }}
+        <div class="article-image">
+            <img src="{{ $image.Permalink }}" width="{{ $image.Width }}" height="{{ $image.Height }}" loading="lazy"
+                alt="Featured image of post {{ .context.Title }}">
+        </div>
         {{ end }}
 
         <div class="article-details">
@@ -36,4 +14,4 @@
             </h2>
         </div>
     </a>
-</article>
+</article>