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

server/utils/parseImages.ts

@@ -0,0 +1,29 @@
+import { parser } from "rich-markdown-editor";
+
+export default function parseImages(text: string): string[] {
+  const value = parser.parse(text);
+  // @ts-expect-error ts-migrate(7034) FIXME: Variable 'images' implicitly has type 'any[]' in s... Remove this comment to see the full error message
+  const images = [];
+
+  // @ts-expect-error ts-migrate(7006) FIXME: Parameter 'node' implicitly has an 'any' type.
+  function findImages(node) {
+    if (node.type.name === "image") {
+      // @ts-expect-error ts-migrate(7005) FIXME: Variable 'images' implicitly has an 'any[]' type.
+      if (!images.includes(node.attrs.src)) {
+        images.push(node.attrs.src);
+      }
+
+      return;
+    }
+
+    if (!node.content.size) {
+      return;
+    }
+
+    node.content.descendants(findImages);
+  }
+
+  findImages(value);
+  // @ts-expect-error ts-migrate(7005) FIXME: Variable 'images' implicitly has an 'any[]' type.
+  return images;
+}