feat: add code path explorer

.gitignore

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+# Dependency directories
+node_modules/
+dist/

.markdownlint.json

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+{
+    "default": true,
+    "MD004": {
+        "style": "asterisk"
+    },
+    "MD009": false,
+    "MD012": false,
+    "MD013": false,
+    "MD014": false,
+    "MD025": false,
+    "MD026": false,
+    "MD033": false,
+    "MD034": false,
+    "MD040": false,
+    "MD041": false,
+    "MD047": false,
+    "MD049": {
+        "style": "asterisk"
+    }
+}

.markdownlintignore

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+node_modules

.stylelintrc.cjs

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+"use strict";
+
+module.exports = {
+    extends: ["stylelint-config-standard-scss"],
+    rules: {
+        "alpha-value-notation": "number",
+        "at-rule-empty-line-before": null,
+        "color-function-notation": "legacy",
+        "color-hex-case": null,
+        "custom-property-empty-line-before": null,
+        "custom-property-pattern": null,
+        "declaration-block-no-duplicate-properties": [true, {
+            ignore: ["consecutive-duplicates-with-different-values"]
+        }],
+        "declaration-block-no-redundant-longhand-properties": null,
+        "declaration-block-no-shorthand-property-overrides": null,
+        "hue-degree-notation": "number",
+        indentation: 4,
+        "max-line-length": null,
+        "no-descending-specificity": null,
+        "number-leading-zero": null,
+        "number-no-trailing-zeros": null,
+        "property-no-unknown": null,
+        "property-no-vendor-prefix": null,
+        "selector-class-pattern": null,
+        "value-keyword-case": null
+    }
+};

.vscode/settings.json

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+{
+    "eslint.experimental.useFlatConfig": true
+}

README.md

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-# code-explorer
+# code-explorer
+
+This repository contains the source code for the ESLint Explorer (<https://explorer.eslint.org>).
+
+## Developer Setup
+
+In order to run the website, you must have [Node.js](https://nodejs.org) installed.
+
+1. Create a fork of the repository
+2. Run `npm install` to install the dependencies
+3. Run `npm start` to start the development server at <http://localhost:5173/>

eslint.config.js

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+import eslintConfigESLintCJS from "eslint-config-eslint/cjs";
+import globals from "globals";
+import reactPlugin from "eslint-plugin-react";
+import reactRecommended from "eslint-plugin-react/configs/recommended.js";
+import jsxA11yPlugin from "eslint-plugin-jsx-a11y";
+import reactHooksPlugin from "eslint-plugin-react-hooks";
+import { fixupPluginRules } from "@eslint/compat";
+
+export default [
+    {
+        ignores: [
+            "dist/"
+        ]
+    },
+    ...eslintConfigESLintCJS,
+    {
+        files: ["**/*.{js,jsx,cjs}"],
+        rules: {
+
+            // Disable rules that the codebase doesn't currently follow.
+            "jsdoc/require-jsdoc": "off",
+            "jsdoc/require-returns": "off",
+            "jsdoc/require-param-description": "off",
+            "jsdoc/require-param-type": "off",
+            "jsdoc/no-bad-blocks": ["error", {
+                ignore: ["__PURE__"]
+            }],
+            "n/no-extraneous-require": ["error", {
+                allowModules: ["luxon"]
+            }]
+        }
+    },
+    {
+        files: ["**/*.{js,jsx}"],
+        languageOptions: {
+            sourceType: "module",
+            parserOptions: {
+                ecmaFeatures: {
+                    jsx: true
+                }
+            }
+        }
+    },
+    {
+        files: ["**/*.cjs"],
+        languageOptions: {
+            sourceType: "script"
+        }
+    },
+    {
+        files: ["src/**/*.{js,jsx}"],
+        plugins: {
+            react: fixupPluginRules(reactPlugin),
+            "jsx-a11y": fixupPluginRules(jsxA11yPlugin),
+            "react-hooks": fixupPluginRules(reactHooksPlugin)
+        },
+        settings: {
+            react: {
+                version: "16.8.6"
+            }
+        },
+        languageOptions: {
+            globals: {
+                ...globals.browser,
+                ...globals.es2021
+            }
+        },
+        rules: {
+            ...reactRecommended.rules,
+            ...jsxA11yPlugin.configs.recommended.rules,
+            "react/jsx-no-useless-fragment": "error",
+            "react/jsx-no-target-blank": "error",
+
+            // Disable rules that the codebase doesn't currently follow.
+            // It might be a good idea to enable these in the future.
+            "jsx-a11y/no-onchange": "off",
+            "react/prop-types": "off",
+            "jsdoc/require-jsdoc": "off",
+            "react-hooks/rules-of-hooks": "error",
+            "react-hooks/exhaustive-deps": "warn",
+
+            // Disable eslint-plugin-node rules from eslint-config-eslint
+            "no-process-exit": "off",
+            "func-style": "off",
+            "n/no-deprecated-api": "off",
+            "n/no-extraneous-require": "off",
+            "n/no-missing-require": "off",
+            "n/no-unpublished-bin": "off",
+            "n/no-unpublished-require": "off",
+            "n/no-unsupported-features/es-builtins": "off",
+            "n/no-unsupported-features/es-syntax": "off",
+            "n/no-unsupported-features/node-builtins": "off",
+            "n/process-exit-as-throw": "off",
+            "n/shebang": "off",
+            "n/no-extraneous-import": "off",
+            "n/no-missing-import": "off",
+            "n/no-unpublished-import": "off"
+        }
+    }
+];

index.html

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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>ESLint Explorer</title>
+  </head>
+  <body>
+    <div id="explorer-app"></div>
+    <script type="module" src="/src/index.jsx"></script>
+  </body>
+</html>