feat: make the locations table (plus related content above & below) 2/3 width

app/views/locations/index.html.erb

@@ -11,15 +11,17 @@
 
 <%= render partial: "organisations/headings", locals: { main: @scheme.service_name, sub: nil } %>
 
-<%= render SubNavigationComponent.new(items: scheme_items(request.path, @scheme.id, "Locations")) %>
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds-from-desktop">
+    <%= render SubNavigationComponent.new(items: scheme_items(request.path, @scheme.id, "Locations")) %>
 
-<h2 class="govuk-visually-hidden">Locations</h2>
+    <h2 class="govuk-visually-hidden">Locations</h2>
 
-<%= render SearchComponent.new(current_user:, search_label: "Search by location name or postcode", value: @searched) %>
+    <%= render SearchComponent.new(current_user:, search_label: "Search by location name or postcode", value: @searched) %>
 
-<%= govuk_section_break(visible: true, size: "m") %>
+    <%= govuk_section_break(visible: true, size: "m") %>
 
-<%= govuk_table do |table| %>
+    <%= govuk_table do |table| %>
       <%= table.caption(classes: %w[govuk-!-font-size-19 govuk-!-font-weight-regular]) do |caption| %>
         <%= render(SearchResultCaptionComponent.new(searched: @searched, count: @pagy.count, item_label:, total_count: @total_count, item: "locations", path: request.path)) %>
       <% end %>
@@ -45,7 +47,9 @@
             <% end %>
         <% end %>
       <% end %>
-<% end %>
+    <% end %>
-<%= govuk_button_link_to "Add a location", new_scheme_location_path(scheme_id: @scheme.id), secondary: true %>
+    <%= govuk_button_link_to "Add a location", new_scheme_location_path(scheme_id: @scheme.id), secondary: true %>
+  </div>
+</div>
 
 <%== render partial: "pagy/nav", locals: { pagy: @pagy, item_name: "locations" } %>