Update the module table in top page

Author: seratch

docs/index.md

@@ -20,13 +20,20 @@ The table below shows all the available modules in the Slack Java SDK. All of th
 
 All released versions are available on the Maven Central repositories. The latest version is **{{ site.sdkLatestVersion }}**.
 
+#### Bolt & Built-in Extensions
+
 |groupId:artifactId|Description|
 |---|---|
 |[**com.slack.api:bolt**](https://search.maven.org/search?q=g:com.slack.api%20AND%20a:bolt) [📖](https://oss.sonatype.org/service/local/repositories/releases/archive/com/slack/api/bolt/{{ site.sdkLatestVersion }}/bolt-{{ site.sdkLatestVersion }}-javadoc.jar/!/index.html#package)|Bolt is a framework that offers an abstraction layer to build Slack apps safely and quickly. The most commonly used Servlet environment is supported out-of-the-box.|
 |[**com.slack.api:bolt-jetty**](https://search.maven.org/search?q=g:com.slack.api%20AND%20a:bolt-jetty) [📖](https://oss.sonatype.org/service/local/repositories/releases/archive/com/slack/api/bolt-jetty/{{ site.sdkLatestVersion }}/bolt-jetty-{{ site.sdkLatestVersion }}-javadoc.jar/!/index.html#package)|This module offers a handy way to run Bolt apps on the [Jetty HTTP server](https://www.eclipse.org/jetty/).|
 |[**com.slack.api:bolt-aws-lambda**](https://search.maven.org/search?q=g:com.slack.api%20AND%20a:bolt-aws-lambda) [📖](https://oss.sonatype.org/service/local/repositories/releases/archive/com/slack/api/bolt-aws-lambda/{{ site.sdkLatestVersion }}/bolt-aws-lambda-{{ site.sdkLatestVersion }}-javadoc.jar/!/index.html#package)|This module offers a handy way to run Bolt apps on AWS [API Gateway](https://aws.amazon.com/api-gateway/) + [Lambda](https://aws.amazon.com/lambda/).|
 |[**com.slack.api:bolt-micronaut**](https://search.maven.org/search?q=g:com.slack.api%20AND%20a:bolt-micronaut) [📖](https://oss.sonatype.org/service/local/repositories/releases/archive/com/slack/api/bolt-micronaut/{{ site.sdkLatestVersion }}/bolt-micronaut-{{ site.sdkLatestVersion }}-javadoc.jar/!/index.html#package)|This is an adapter for [Micronaut](https://micronaut.io/) to run Bolt apps on top of it.|
 |[**com.slack.api:bolt-helidon**](https://search.maven.org/search?q=g:com.slack.api%20AND%20a:bolt-helidon) [📖](https://oss.sonatype.org/service/local/repositories/releases/archive/com/slack/api/bolt-helidon/{{ site.sdkLatestVersion }}/bolt-helidon-{{ site.sdkLatestVersion }}-javadoc.jar/!/index.html#package)|This is an adapter for [Helidon SE](https://helidon.io/docs/latest/) to run Bolt apps on top of it.|
+
+#### Foundation Modules
+
+|groupId:artifactId|Description|
+|---|---|
 |[**com.slack.api:slack-api-model**](https://search.maven.org/search?q=g:com.slack.api%20AND%20a:slack-api-model) [📖](https://oss.sonatype.org/service/local/repositories/releases/archive/com/slack/api/slack-api-model/{{ site.sdkLatestVersion }}/slack-api-model-{{ site.sdkLatestVersion }}-javadoc.jar/!/index.html#package)|This is a collection of the classes representing the [Slack core objects](https://api.slack.com/types) such as conversations, messages, users, blocks, and surfaces. As this is an essential part of the SDK, all other modules depend on this.|
 |[**com.slack.api:slack-api-client**](https://search.maven.org/search?q=g:com.slack.api%20AND%20a:slack-api-client) [📖](https://oss.sonatype.org/service/local/repositories/releases/archive/com/slack/api/slack-api-client/{{ site.sdkLatestVersion }}/slack-api-client-{{ site.sdkLatestVersion }}-javadoc.jar/!/index.html#package)|This is a collection of the Slack API clients. The supported are Basic API Methods, RTM (Real Time Messaging) API, SCIM API, Audit Logs API, and Status API.|
 |[**com.slack.api:slack-app-backend**](https://search.maven.org/search?q=g:com.slack.api%20AND%20a:slack-app-backend) [📖](https://oss.sonatype.org/service/local/repositories/releases/archive/com/slack/api/slack-app-backend/{{ site.sdkLatestVersion }}/slack-app-backend-{{ site.sdkLatestVersion }}-javadoc.jar/!/index.html#package)|This module is a set of Slack app server-side handlers and data classes for Events API, Interactive Components, Slash Commands, Actions, and OAuth flow. These are used by Bolt framework as the foundation of it in primitive layers.|