Migrate from Jest to node:test (#115)

frontend/sync-client/src/utils/assert-set-contains-exactly.ts

@@ -1,7 +1,7 @@
-import * as assert from "assert";
+import assert from "node:assert";
 
 export function assertSetContainsExactly<T>(set: Set<T>, ...values: T[]): void {
-	assert(
+	assert.ok(
 		set.size === values.length &&
 			Array.from(set).every((value) => values.includes(value)),
 		`Expected set to contain only ${values.map((v) => '"' + v + '"').join(", ")}, but it contained ${Array.from(