Fix accessibility problems with the search pagination

The problem was that the next/prev links didn't have any text. For some
reason, the pagination markup on this page was different than, say, that
in crates.hbs. We really should fix rust-lang#8 for real someday 😂

Author: carols10cents

app/templates/search.hbs

@@ -79,17 +79,24 @@
     {{/each}}
   </div>
 
-  <div class='pagination'>
-    {{#link-to (query-params page=prevPage) class='prev'}}
+  <nav class='pagination' aria-label="Pagination navigation">
+    {{#link-to (query-params page=prevPage) class="prev" rel="prev" title="previous page" data-test-pagination-prev=true}}
       {{svg-jar "left-pag"}}
     {{/link-to}}
-    {{#each pages as |page|}}
-      {{#link-to (query-params page=page)}}{{ page }}{{/link-to}}
-    {{/each}}
-    {{#link-to (query-params page=nextPage) class='next'}}
+    <ol>
+      {{#each pages as |page|}}
+        <li>
+          {{#link-to (query-params page=page) title=(concat "Go to page " page)}}
+            {{ page }}
+          {{/link-to}}
+        </li>
+      {{/each}}
+    </ol>
+    {{#link-to (query-params page=nextPage) class="next" rel="next" title="next page" data-test-pagination-next=true}}
       {{svg-jar "right-pag"}}
     {{/link-to}}
-  </div>
+  </nav>
+
 {{else}}
   <div id="no-results">
     <h2>0 crates found. <a href='https://doc.rust-lang.org/cargo/getting-started/'>Get started</a> and create your own.</h2>