Enable the @typescript-eslint/no-explicit-any eslint rule (#1830)

## Description:

Enable the `@typescript-eslint/no-explicit-any` eslint rule.

Fixes #1789

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

src/core/worker/Worker.worker.ts

@@ -13,7 +13,7 @@ import {
   WorkerMessage,
 } from "./WorkerMessages";
 
-const ctx: Worker = self as any;
+const ctx: Worker = self as unknown as Worker;
 let gameRunner: Promise<GameRunner> | null = null;
 const mapLoader = new FetchGameMapLoader(`/maps`, version);