App: Add TS type information

src/lib/database.ts

@@ -0,0 +1,7 @@
+/**
+ * Retrieve an arbitrary object with a matching ID from an Array.
+ * Supposed to use on collections returned by the PocketBase API.
+ */
+export const get_by_id = <T extends object>(objects: Array<T>, id: string): T | undefined => {
+  return objects.find((o: T) => ("id" in o ? o.id === id : false));
+};