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/models/View.ts

@@ -0,0 +1,24 @@
+import { action } from "mobx";
+import BaseModel from "./BaseModel";
+import User from "./User";
+
+class View extends BaseModel {
+  id: string;
+
+  documentId: string;
+
+  firstViewedAt: string;
+
+  lastViewedAt: string;
+
+  count: number;
+
+  user: User;
+
+  @action
+  touch() {
+    this.lastViewedAt = new Date().toString();
+  }
+}
+
+export default View;