💄 Migrate to ESLint v9.16.0 (#25)

* Migrate to ESLint `v9.16.0`

* 👷 Add lint to CI

Author: tolauwae

.eslint.config.mjs

@@ -0,0 +1,20 @@
+import globals from "globals";
+import pluginJs from "@eslint/js";
+import tseslint from "typescript-eslint";
+import stylisticJs from '@stylistic/eslint-plugin-js'
+
+
+/** @type {import('eslint').Linter.Config[]} */
+export default [
+  { plugins: {
+      '@stylistic/js': stylisticJs
+    }, rules: {
+      '@stylistic/js/indent': ['error', 4],
+    }
+  },
+  {files: ["**/*.{js,mjs,cjs,ts}"]},
+  {files: ["**/*.js"], languageOptions: {sourceType: "commonjs"}},
+  {languageOptions: { globals: globals.browser }},
+  pluginJs.configs.recommended,
+  ...tseslint.configs.recommended,
+];

.eslintrc.json

@@ -0,0 +1,41 @@
+name: ESLint
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  schedule:
+    - cron: '30 12 * * 3'
+
+jobs:
+  eslint:
+    name: Run eslint scanning
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install ESLint
+        run: |
+          npm install
+          npm install @microsoft/eslint-formatter-sarif
+
+      - name: Run ESLint
+        env:
+          SARIF_ESLINT_IGNORE_SUPPRESSED: "true"
+        run: npx eslint src/**/*
+          --config .eslint.config.mjs
+          --format @microsoft/eslint-formatter-sarif
+          --output-file eslint-results.sarif
+        continue-on-error: true
+
+      - name: Upload analysis results to GitHub
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: eslint-results.sarif
+          wait-for-processing: true
+