Create index.md for docs. Fixes #458

Author: colinmurphy

docs/index.md

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+# Introduction
+
+## What is the Headless WordPress Toolkit?
+
+The Headless WordPress Toolkit is a modern, framework-agnostic toolkit for building headless WordPress applications. It provides a collection of plugins, packages, and examples to help developers make WordPress a better headless CMS.
+
+Our goal is to provide developers with the tools they need to build fast, scalable, and secure headless applications with WordPress, without being tied to a specific frontend framework.
+
+## Plugins
+
+The toolkit includes several WordPress plugins to enhance the headless experience.
+
+| Plugin | Description |
+|--------|-------------|
+| [`hwp-previews`](../plugins/hwp-previews/) | Headless Previews solution for WordPress: fully configurable preview URLs via the settings page which is framework agnostic. |
+| [`wpgraphql-webhooks`](../plugins/wpgraphql-webhooks/) | Extends WPGraphQL to support webhook subscriptions and dispatching for headless WordPress environments. |
+| [`wpgraphql-logging`](../plugins/wpgraphql-logging/) | Logging for WPGraphQL requests with granular lifecycle events and Monolog integration. |
+| [`wpgraphql-debug-extensions`](../plugins/wpgraphql-debug-extensions/) | Advanced debugging, performance analysis, and metric collection for WPGraphQL. |
+
+You can find more information about installation in the [plugins documentation](../plugins/README.md).
+
+## Packages
+
+We provide NPM packages that can be used in your frontend applications. All packages use vanilla ES Modules with no build step.
+
+- [`@wpengine/hwp-toolbar`](../packages/toolbar/) — in active development (not yet published)
+
+> [!NOTE]
+> No packages are published to npm yet. These are pre-release and subject to change.
+
+## Examples
+
+This project contains a wide variety of examples demonstrating how to use the Headless WordPress Toolkit with different frameworks like Next.js, Astro, SvelteKit, and Nuxt.
+
+Most examples include a `wp-env` setup, allowing you to fully configure a headless application with a single command.
+
+For a full list of examples and how to run them, please see the [examples documentation](../examples/README.md).