Use Search input for Search

This has a few advantages, one of which is being able to press <kbd>Escape</kbd> to clear the input. It's more semantically correct too :-)

libs/common-docs/src/lib/common/search-input/search-input.component.html

@@ -2,7 +2,7 @@
   <div class="input-container" [class.hideInput]="!showInput">
     <input
       #searchInput
-      type="text"
+      type="search"
       aria-label="Search in docs"
       name="search"
       placeholder="Search..."