Move analytics into separate files

layouts/partials/paige/analytics/yandex.html

@@ -0,0 +1,9 @@
+{{ $page := . }}
+
+{{ with $page.Param "paige.analytics.yandex" }}
+    <script>
+    (function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
+    (window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");
+    ym("{{ .account_id | safeJS }}", "init", {});
+    </script>
+{{ end }}