build: add ESLint configuration file

Author: sy-records

.eslintignore

@@ -0,0 +1,30 @@
+import {defineConfig, globalIgnores} from 'eslint/config'
+import path from 'node:path'
+import {fileURLToPath} from 'node:url'
+import js from '@eslint/js'
+import {FlatCompat} from '@eslint/eslintrc'
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(__filename)
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all
+})
+
+export default defineConfig([globalIgnores(['**/.git/']), {
+  extends: compat.extends('xo-space'),
+
+  rules: {
+    semi: [2, 'never'],
+    'no-return-assign': 'off',
+    'no-unused-expressions': 'off',
+    'no-new-func': 'off',
+    'no-multi-assign': 'off',
+    'no-mixed-operators': 'off',
+    'max-params': 'off',
+    'no-script-url': 'off',
+    camelcase: 'off',
+    'no-warning-comments': 'off'
+  }
+}])