chore: migrate to eslint defineConfig (#3632)

Author: Shinigami92

eslint.config.ts

@@ -6,12 +6,13 @@ import eslintPluginFileProgress from 'eslint-plugin-file-progress';
 import eslintPluginJsdoc from 'eslint-plugin-jsdoc';
 import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
 import eslintPluginUnicorn from 'eslint-plugin-unicorn';
+import { defineConfig } from 'eslint/config';
 import { resolve } from 'node:path';
 import tseslint from 'typescript-eslint';
 
 const gitignorePath = resolve(import.meta.dirname, '.gitignore');
 
-const config: ReturnType<typeof tseslint.config> = tseslint.config(
+export default defineConfig(
   //#region global
   includeIgnoreFile(gitignorePath),
   {
@@ -51,7 +52,7 @@ const config: ReturnType<typeof tseslint.config> = tseslint.config(
   //#endregion
 
   //#region typescript-eslint
-  ...tseslint.configs.strictTypeChecked,
+  tseslint.configs.strictTypeChecked,
   {
     name: 'typescript-eslint overrides',
     languageOptions: {
@@ -255,6 +256,7 @@ const config: ReturnType<typeof tseslint.config> = tseslint.config(
     name: 'test/**/*.ts overrides',
     files: ['test/**/*.spec.ts', 'test/**/*.spec.cts', 'test/**/*.spec.d.ts'],
     plugins: {
+      // @ts-expect-error: weird type error
       vitest: eslintPluginVitest,
     },
     rules: {
@@ -292,5 +294,3 @@ const config: ReturnType<typeof tseslint.config> = tseslint.config(
   }
   //#endregion
 );
-
-export default config;