Customize <title> and add new <meta> description tag

Author: lauzadis

docs/dokka-presets/templates/includes/page_metadata.ftl

@@ -0,0 +1,7 @@
+<#macro display>
+    <title>${pageName} - AWS SDK for Kotlin</title>
+    <meta name="description" content="Learn how to use ${pageName} in the AWS SDK for Kotlin">
+    <@template_cmd name="pathToRoot">
+        <link href="${pathToRoot}images/logo-icon.svg" rel="icon" type="image/svg">
+    </@template_cmd>
+</#macro>