doc: add analytics

docs/javascripts/analytics.js

@@ -0,0 +1,44 @@
+!(function (t, e) {
+  var o, n, p, r;
+  e.__SV ||
+    ((window.posthog = e),
+    (e._i = []),
+    (e.init = function (i, s, a) {
+      function g(t, e) {
+        var o = e.split(".");
+        2 == o.length && ((t = t[o[0]]), (e = o[1])),
+          (t[e] = function () {
+            t.push([e].concat(Array.prototype.slice.call(arguments, 0)));
+          });
+      }
+      ((p = t.createElement("script")).type = "text/javascript"),
+        (p.async = !0),
+        (p.src = s.api_host + "/static/array.js"),
+        (r = t.getElementsByTagName("script")[0]).parentNode.insertBefore(p, r);
+      var u = e;
+      for (
+        void 0 !== a ? (u = e[a] = []) : (a = "posthog"),
+          u.people = u.people || [],
+          u.toString = function (t) {
+            var e = "posthog";
+            return "posthog" !== a && (e += "." + a), t || (e += " (stub)"), e;
+          },
+          u.people.toString = function () {
+            return u.toString(1) + ".people (stub)";
+          },
+          o =
+            "capture identify alias people.set people.set_once set_config register register_once unregister opt_out_capturing has_opted_out_capturing opt_in_capturing reset isFeatureEnabled onFeatureFlags getFeatureFlag getFeatureFlagPayload reloadFeatureFlags group updateEarlyAccessFeatureEnrollment getEarlyAccessFeatures getActiveMatchingSurveys getSurveys onSessionId".split(
+              " "
+            ),
+          n = 0;
+        n < o.length;
+        n++
+      )
+        g(u, o[n]);
+      e._i.push([i, s, a]);
+    }),
+    (e.__SV = 1));
+})(document, window.posthog || []);
+posthog.init("phc_heGq5qRBu31jz8t3GGPYoLrLWO4AatFqwjgt7sGeT6n", {
+  api_host: "https://app.posthog.com",
+});

mkdocs.yml

@@ -185,6 +185,7 @@ extra:
       link: https://github.com/jxnl
 extra_javascript:
   - javascripts/mathjax.js
+  - javascripts/analytics.js
   - https://polyfill.io/v3/polyfill.min.js?features=es6
   - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
 copyright: Copyright © 2023 Jason Liu