Organise files more consistently

Signed-off-by: Rūdolfs Ošiņš <rudolfs@osins.org>

tests/unit/cache.test.ts

@@ -1,4 +1,4 @@
-import { cached } from "@app/cache";
+import { cached } from "@app/lib/cache";
 import { expect, test, vi } from "vitest";
 
 test("it caches undefined return values", async () => {

tests/unit/router.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, test } from "vitest";
-import { routeToPath } from "@app/router/index";
-import { testExports } from "@app/router/index";
+import { routeToPath } from "@app/lib/router";
+import { testExports } from "@app/lib/router";
 
 // Defining the window.origin value, since vitest doesn't provide one.
 window.origin = "http://localhost:3000";

tests/unit/utils.test.ts

@@ -1,8 +1,8 @@
-import type { Wallet } from "@app/wallet";
+import type { Wallet } from "@app/lib/wallet";
 
 import { BigNumber } from "ethers";
 import { describe, expect, test } from "vitest";
-import * as utils from "@app/utils";
+import * as utils from "@app/lib/utils";
 
 describe("Conversions", () => {
   test("toWei", () => {