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/dataURItoBuffer.ts

@@ -0,0 +1,16 @@
+export default function dataURItoBuffer(dataURI: string) {
+  const split = dataURI.split(",");
+
+  if (!dataURI.startsWith("data") || split.length <= 1) {
+    throw new Error("Not a dataURI");
+  }
+
+  // separate out the mime component
+  const type = split[0].split(":")[1].split(";")[0];
+  // convert base64 to buffer
+  const buffer = Buffer.from(split[1], "base64");
+  return {
+    buffer,
+    type,
+  };
+}