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/Breadcrumb.tsx

@@ -0,0 +1,88 @@
+import { GoToIcon } from "outline-icons";
+import * as React from "react";
+import { Link } from "react-router-dom";
+import styled from "styled-components";
+import Flex from "~/components/Flex";
+import BreadcrumbMenu from "~/menus/BreadcrumbMenu";
+import { MenuInternalLink } from "~/types";
+
+export type Crumb = {
+  title: React.ReactNode;
+  icon?: React.ReactNode;
+  to?: string;
+};
+
+type Props = {
+  items: Crumb[];
+  max?: number;
+  children?: React.ReactNode;
+  highlightFirstItem?: boolean;
+};
+
+function Breadcrumb({ items, highlightFirstItem, children, max = 2 }: Props) {
+  const totalItems = items.length;
+  const topLevelItems: Crumb[] = [...items];
+  let overflowItems;
+
+  // chop middle breadcrumbs and present a "..." menu instead
+  if (totalItems > max) {
+    const halfMax = Math.floor(max / 2);
+    overflowItems = topLevelItems.splice(halfMax, totalItems - max);
+
+    topLevelItems.splice(halfMax, 0, {
+      title: <BreadcrumbMenu items={overflowItems as MenuInternalLink[]} />,
+    });
+  }
+
+  return (
+    <Flex justify="flex-start" align="center">
+      {topLevelItems.map((item, index) => (
+        <React.Fragment key={item.to || index}>
+          {item.icon}
+          {item.to ? (
+            <Item
+              to={item.to}
+              $withIcon={!!item.icon}
+              $highlight={!!highlightFirstItem && index === 0}
+            >
+              {item.title}
+            </Item>
+          ) : (
+            item.title
+          )}
+          {index !== topLevelItems.length - 1 || !!children ? <Slash /> : null}
+        </React.Fragment>
+      ))}
+      {children}
+    </Flex>
+  );
+}
+
+const Slash = styled(GoToIcon)`
+  flex-shrink: 0;
+  fill: ${(props) => props.theme.divider};
+`;
+
+const Item = styled(Link)<{ $highlight: boolean; $withIcon: boolean }>`
+  display: flex;
+  flex-shrink: 1;
+  min-width: 0;
+  color: ${(props) => props.theme.text};
+  font-size: 15px;
+  height: 24px;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  overflow: hidden;
+  font-weight: ${(props) => (props.$highlight ? "500" : "inherit")};
+  margin-left: ${(props) => (props.$withIcon ? "4px" : "0")};
+
+  svg {
+    flex-shrink: 0;
+  }
+
+  &:hover {
+    text-decoration: underline;
+  }
+`;
+
+export default Breadcrumb;