crate.version: Add loading spinner for the README

Author: Turbo87

app/styles/crate/version.module.css

@@ -31,6 +31,22 @@
     margin-bottom: 20px;
 }
 
+.readme-spinner {
+    padding: 40px 15px;
+    text-align: center;
+    font-size: 20px;
+    font-weight: 300;
+
+    code {
+        font-size: 18px;
+        font-weight: 500;
+    }
+}
+
+.readme-spinner > div {
+    --spinner-size: 35px;
+}
+
 .crate-downloads {
     display: flex;
     flex-wrap: wrap;

app/templates/crate/version.hbs

@@ -14,7 +14,11 @@
         one that has not been yanked.
       </p>
     {{else}}
-      {{#if this.readme}}
+      {{#if this.loadReadmeTask.isRunning}}
+        <div local-class="readme-spinner">
+          <LoadingSpinner/>
+        </div>
+      {{else if this.readme}}
         <article aria-label="Readme">
           <RenderedHtml @html={{this.readme}} local-class="readme" />
         </article>