chore: move to eslint 10 and typescript-eslint 8 with flat config

Author: Endika

.eslintrc.cjs

@@ -0,0 +1,42 @@
+import js from '@eslint/js'
+import globals from 'globals'
+import tseslint from 'typescript-eslint'
+import prettier from 'eslint-config-prettier'
+
+export default tseslint.config(
+  {
+    ignores: ['dist', 'coverage', 'node_modules', '**/*.config.ts', '**/*.config.js'],
+  },
+  js.configs.recommended,
+  ...tseslint.configs.recommended,
+  ...tseslint.configs.recommendedTypeChecked,
+  prettier,
+  {
+    languageOptions: {
+      parserOptions: {
+        project: './tsconfig.json',
+        ecmaVersion: 2022,
+        sourceType: 'module',
+      },
+      globals: {
+        ...globals.browser,
+        ...globals.node,
+      },
+    },
+    rules: {
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        { argsIgnorePattern: '^_', varsIgnorePattern: '^_' },
+      ],
+      '@typescript-eslint/consistent-type-imports': 'error',
+      '@typescript-eslint/no-floating-promises': 'error',
+      '@typescript-eslint/no-misused-promises': 'error',
+      '@typescript-eslint/no-explicit-any': 'error',
+      '@typescript-eslint/explicit-function-return-type': ['warn', { allowExpressions: true }],
+      'no-console': ['warn', { allow: ['warn', 'error'] }],
+      eqeqeq: ['error', 'always'],
+      'prefer-const': 'error',
+      'no-var': 'error',
+    },
+  },
+)