feat: Installs ESLint. (#673)

Author: willum070

eslint.config.mjs

@@ -0,0 +1,17 @@
+import js from "@eslint/js";
+import globals from "globals";
+import tseslint from "typescript-eslint";
+import json from "@eslint/json";
+import markdown from "@eslint/markdown";
+import css from "@eslint/css";
+import { defineConfig } from "eslint/config";
+
+export default defineConfig([
+  { files: ["**/*.{js,mjs,cjs,ts,mts,cts}"], plugins: { js }, extends: ["js/recommended"], languageOptions: { globals: {...globals.browser, ...globals.node} } },
+  tseslint.configs.recommended,
+  { files: ["**/*.json"], plugins: { json }, language: "json/json", extends: ["json/recommended"] },
+  { files: ["**/*.jsonc"], plugins: { json }, language: "json/jsonc", extends: ["json/recommended"] },
+  { files: ["**/*.json5"], plugins: { json }, language: "json/json5", extends: ["json/recommended"] },
+  { files: ["**/*.md"], plugins: { markdown }, language: "markdown/gfm", extends: ["markdown/recommended"] },
+  { files: ["**/*.css"], plugins: { css }, language: "css/css", extends: ["css/recommended"] },
+]);