Add publisher_metadata partial and scss

Commit audit trail:
- https://github.com/alphagov/government-frontend/blob/0aee348d51cebacd5344115f2ca02bdb17095249/app/views/shared/_publisher_metadata_with_logo.html.erb
- https://github.com/alphagov/government-frontend/blob/0aee348d51cebacd5344115f2ca02bdb17095249/app/assets/stylesheets/helpers/_publisher-metadata-with-logo.scss

As we dont need the logo part of the partial for case studies, I have removed it and renamed the partial

app/assets/stylesheets/helpers/_publisher-metadata-with-logo.scss

@@ -0,0 +1,24 @@
+@import "govuk_publishing_components/individual_component_support";
+
+.metadata-logo-wrapper {
+  border-top: 1px solid $govuk-border-colour;
+  margin-left: govuk-spacing(3);
+  margin-right: govuk-spacing(3);
+  @include govuk-clearfix;
+
+  .metadata-column {
+    padding-left: 0;
+    padding-top: govuk-spacing(3);
+  }
+
+  .metadata-logo {
+    max-height: 90px;
+    max-width: 100%;
+    padding-bottom: govuk-spacing(3);
+    padding-top: govuk-spacing(3);
+
+    @include govuk-media-query($from: tablet) {
+      float: right;
+    }
+  }
+}

app/views/shared/_publisher_metadata.html.erb

@@ -0,0 +1,16 @@
+<%
+  add_stylesheet_path("helpers/_publisher-metadata-with-logo.css")
+%>
+
+<div class="govuk-grid-row govuk-!-margin-top-3">
+  <div class="metadata-logo-wrapper">
+    <div class="govuk-grid-column-two-thirds metadata-column">
+      <%= render 'govuk_publishing_components/components/metadata', {
+        from: locals[:from],
+        first_published: locals[:first_published],
+        last_updated: locals[:last_updated],
+        see_updates_link: locals[:see_updates_link],
+      } %>
+    </div>
+  </div>
+</div>

config/initializers/dartsass.rb

@@ -28,6 +28,7 @@
   "views/_landing_page/quote.scss" => "views/_landing_page/quote.css",
   "views/_landing_page/side-navigation.scss" => "views/_landing_page/side-navigation.css",
   "views/_landing_page/themes/prime-ministers-office-10-downing-street.scss" => "views/_landing_page/themes/prime-ministers-office-10-downing-street.css",
+  "helpers/_publisher-metadata-with-logo.scss" => "helpers/_publisher-metadata-with-logo.css",
 }.freeze
 
 all_stylesheets = APP_STYLESHEETS.merge(GovukPublishingComponents::Config.all_stylesheets)