Add crisp chat, disable analytics locally, fix date bug on calendar

src/template.html

@@ -23,6 +23,10 @@
 		gtag('config', 'G-C7WBN0S06R');
 	</script>
 
+	<!--Crisp Chat -->
+	<script
+		type="text/javascript">window.$crisp = []; window.CRISP_WEBSITE_ID = "2158dbf9-90d4-4e50-b962-e1d8a1a6deb7"; (function () { d = document; s = d.createElement("script"); s.src = "https://client.crisp.chat/l.js"; s.async = 1; d.getElementsByTagName("head")[0].appendChild(s); })();</script>
+
 	<!-- Sapper creates a <script> tag containing `src/client.js`
 	     and anything else it needs to hydrate the app and
 	     initialise the router -->