chore: Move to Typescript (#2783)

This PR moves the entire project to Typescript. Due to the ~1000 ignores this will lead to a messy codebase for a while, but the churn is worth it – all of those ignore comments are places that were never type-safe previously.

closes #1282

app/components/Analytics.ts

@@ -0,0 +1,45 @@
+/* global ga */
+import * as React from "react";
+import env from "~/env";
+
+type Props = {
+  children?: React.ReactNode;
+};
+
+export default class Analytics extends React.Component<Props> {
+  componentDidMount() {
+    if (!env.GOOGLE_ANALYTICS_ID) {
+      return;
+    }
+
+    // standard Google Analytics script
+    window.ga =
+      window.ga ||
+      function (...args) {
+        (ga.q = ga.q || []).push(args);
+      };
+
+    ga.l = +new Date();
+    ga("create", env.GOOGLE_ANALYTICS_ID, "auto");
+    ga("set", {
+      dimension1: "true",
+    });
+    ga("send", "pageview");
+    const script = document.createElement("script");
+    script.src = "https://www.google-analytics.com/analytics.js";
+    script.async = true;
+
+    // Track PWA install event
+    window.addEventListener("appinstalled", () => {
+      ga("send", "event", "pwa", "install");
+    });
+
+    if (document.body) {
+      document.body.appendChild(script);
+    }
+  }
+
+  render() {
+    return this.props.children || null;
+  }
+}