Diagnostics: Add a new slot for routines in the base card

Bug: 1125150
Test: browser_tests --gtest_filter=DiagnosticsApp*
Change-Id: Ia1fb6ddabd8c6b0a8fea720662d2f4b4b703374c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2462046Reviewed-by: Bailey Berro <baileyberro@chromium.org>
Commit-Queue: Zentaro Kavanagh <zentaro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816220}

chromeos/components/diagnostics_ui/resources/diagnostics_card.html

@@ -19,6 +19,10 @@
     grid-template-columns: 1fr 1fr;
   }
 
+  .routine-container {
+    @apply --diagnostics-default-font;
+  }
+
   .spacing {
     margin: 18px 0px;
     padding-inline-end: 15px;
@@ -42,4 +46,8 @@
       <slot name="body"></slot>
     </div>
   </div>
+
+  <div id="routines" class="routine-container spacing">
+    <slot name="routines"></slot>
+  </div>
 </div>