chore: add eslint

Author: marcalexiei

.github/workflows/CI.yml

@@ -19,6 +19,7 @@ jobs:
 
     runs-on: ${{ matrix.os }}
 
+    name: 'Build and test (OS: ${{ matrix.os }}, Node: ${{ matrix.node-version }})'
     steps:
       - uses: actions/checkout@v4
 
@@ -43,7 +44,7 @@ jobs:
 
     strategy:
       matrix:
-        script: ['format']
+        script: ['format', 'lint']
 
     name: Code check (${{ matrix.script }})
     steps:

eslint.config.mjs

@@ -0,0 +1,20 @@
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import avaPlugin from 'eslint-plugin-ava';
+
+export default tseslint.config(
+  {
+    ignores: [
+      'dist',
+      'ts3.5',
+      '.tests-output',
+      'scripts',
+      'test/fixtures',
+      'coverage',
+      'eslint.config.mjs',
+    ],
+  },
+  eslint.configs.recommended,
+  tseslint.configs.recommended,
+  avaPlugin.configs['flat/recommended'],
+);