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/scenes/Settings/components/SlackButton.tsx

@@ -0,0 +1,37 @@
+import * as React from "react";
+import { useTranslation } from "react-i18next";
+import { slackAuth } from "@shared/utils/routeHelpers";
+import Button from "~/components/Button";
+import SlackIcon from "~/components/SlackIcon";
+import env from "~/env";
+
+type Props = {
+  scopes?: string[];
+  redirectUri: string;
+  state?: string;
+  label?: string;
+};
+
+function SlackButton({ state = "", scopes, redirectUri, label }: Props) {
+  const { t } = useTranslation();
+
+  const handleClick = () =>
+    (window.location.href = slackAuth(
+      state,
+      scopes,
+      env.SLACK_KEY,
+      redirectUri
+    ));
+
+  return (
+    <Button
+      onClick={handleClick}
+      icon={<SlackIcon color="currentColor" />}
+      neutral
+    >
+      {label || t("Add to Slack")}
+    </Button>
+  );
+}
+
+export default SlackButton;