refactor: Replace "ico" partial with "logo" partial (#140)

The icon usage was replaced by fontsource in #96. The remaining icon
infrastructure was only used for the logos of operators.

This PR simplifies the code by replacing the "ico" partial with a "logo"
partial.

In addition to the high complexity of the old "_ico.html", it had some
issues:
- Multiple return statements were used in one partial. This is not
allowed as per docs ("Only one return statement is allowed per partial
file."): https://gohugo.io/templates/partial/#example-getimage
- The whole build process broke when an operator was added without
related logo.

---------

Signed-off-by: lennartrommeiss <lennart.rommeiss@deutschebahn.com>
Co-authored-by: Lennart Rommeiss <61516567+lenderom@users.noreply.github.com>
Co-authored-by: lennartrommeiss <lennart.rommeiss@deutschebahn.com>

Author: MoritzWeber0

assets/svg/logos/bdz.svg renamed to assets/images/logos/bdz.svg

@@ -113,6 +113,7 @@ img {
 .o-list__link {
   display: flex;
   align-items: center;
+  margin-bottom: 1rem;
 }
 
 

assets/svg/logos/bls.svg renamed to assets/images/logos/bls.svg

@@ -5,19 +5,19 @@
             <div class="col-12 col-lg-4 sidemenu">
                 {{ partial "sidemenu.html" . }}
             </div>
-
             <div class="col-12 col-lg-8" data-pagefind-body>
                 <div class="o-single__container content_with_heading">
                     <div class="o-single__header">
                         <div class="o-single__header__title">
                             {{ $object := replace .Path (printf "/%s/" .Page.Type) "" }}
-                            {{ $logo := resources.Get (printf "svg/logos/%s.svg" $object) }}
-                            <img data-pagefind-meta="img" src="{{ $logo.RelPermalink }}" alt="" />
+                            {{ $logo := resources.Get (printf "images/logos/%s.svg" $object) }}
+                            {{ if $logo }}
+                                <img data-pagefind-meta="img" src="{{ $logo.RelPermalink }}" alt="" />
+                            {{ end }}
                             <h1 data-pagefind-meta="title">{{ .Title }}</h1>
                         </div>
                         {{ partial "updateDate.html" . }}
                     </div>
-
                     <div class="content" data-pagefind-weight="2.5">
                         {{- with .Content -}}
                             {{ . | replaceRE "(<h[2] id=\"([^\"]+)\".+)(</h[2]+>)" (print `<span class="a-anchorlink">${1}${3}<a href="#${2}" class="a-anchorlink__link" title="` (T "copyAnchorLink") `">` (partial "icon" "link") `</a></span>`) | safeHTML }}

assets/svg/logos/bsb.svg renamed to assets/images/logos/bsb.svg

@@ -0,0 +1,4 @@
+{{ $logo := resources.Get (printf "/images/logos/%s.svg" .) }}
+{{ if $logo }}
+<img data-pagefind-meta="img" src="{{ $logo.RelPermalink }}" alt="" style="height: 1.3em; width: auto" />
+{{ end }}

assets/svg/logos/cd.svg renamed to assets/images/logos/cd.svg

@@ -1,8 +1,7 @@
 <a href="{{ .RelPermalink }}" class="o-list__link">
   <div class="o-list__picture o-list__picture--operator">
     {{ $object := replace .Path (printf "/%s/" .Page.Type) "" }}
-
-    {{ partial "ico" (dict "icon" $object "theme" "logos" "size" "50") }}
+    {{ partial "logo" $object }}
   </div>
   <div>
     {{ .Title }}

assets/svg/logos/cfl.svg renamed to assets/images/logos/cfl.svg

@@ -30,7 +30,7 @@ <h3 id="related">{{ T "_operator__list_title"}}</h3>
                     {{ $object := replace .Path (printf "/%s/" .Page.Type) "" }}
                     <li>
                         <a id="{{ .LinkTitle }}" href="{{ .RelPermalink }}">
-                            {{ partial "ico" (dict "icon" $object "theme" "logos" "height" "25" "width" "35") }}
+                            {{ partial "logo" $object }}
                             {{ .LinkTitle }}
                         </a>
                     </li>
@@ -50,8 +50,8 @@ <h3 id="related">{{ T "_operator__nearby"}}</h3>
                         {{ $object := replace .Path (printf "/%s/" .Page.Type) "" }}
                         <li>
                             <a id="{{ .LinkTitle }}" href="{{ .RelPermalink }}">
-                                {{ partial "ico" (dict "icon" $object "theme" "logos" "height" "25" "width" "35") }}
-                                {{ .LinkTitle }}
+                                {{ partial "logo" $object }}
+                                <span>{{ .LinkTitle }}</span>
                             </a>
                         </li>
                         {{ end }}