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/BaseModel.ts

@@ -0,0 +1,55 @@
+import { set, observable } from "mobx";
+
+export default class BaseModel {
+  @observable
+  id: string;
+
+  @observable
+  isSaving: boolean;
+
+  store: any;
+
+  constructor(fields: Record<string, any>, store: any) {
+    set(this, fields);
+    this.store = store;
+  }
+
+  save = async (params?: Record<string, any>) => {
+    this.isSaving = true;
+
+    try {
+      // ensure that the id is passed if the document has one
+      if (params) params = { ...params, id: this.id };
+      const model = await this.store.save(params || this.toJS());
+      // if saving is successful set the new values on the model itself
+      set(this, { ...params, ...model });
+      return model;
+    } finally {
+      this.isSaving = false;
+    }
+  };
+
+  fetch = (options?: any) => {
+    return this.store.fetch(this.id, options);
+  };
+
+  refresh = () => {
+    return this.fetch({
+      force: true,
+    });
+  };
+
+  delete = async () => {
+    this.isSaving = true;
+
+    try {
+      return await this.store.delete(this);
+    } finally {
+      this.isSaving = false;
+    }
+  };
+
+  toJS = (): Record<string, any> => {
+    return { ...this };
+  };
+}