Add Antora docs page (#11947)

<!-- readthedocs-preview docs start -->
---
:books: Documentation previews :books:

- User's documentation (`docs`):
https://docs--11947.org.readthedocs.build/en/11947/

<!-- readthedocs-preview docs end -->

<!-- readthedocs-preview dev start -->
- Developer's documentation (`dev`):
https://dev--11947.org.readthedocs.build/en/11947/

<!-- readthedocs-preview dev end -->

Author: ericholscher

docs/user/examples.rst

@@ -22,7 +22,7 @@ Sphinx example with versioning and Python doc autogeneration.
 Markup language
   reStructuredText, Markdown or MyST
 Rendered version
-  https://example-sphinx-basic.readthedocs.io/en/latest/>
+  https://example-sphinx-basic.readthedocs.io/en/latest/
 Repository
   https://github.com/readthedocs-examples/example-sphinx-basic/
 

docs/user/intro/antora.rst

@@ -0,0 +1,51 @@
+Antora
+======
+
+.. meta::
+   :description lang=en: Hosting Antora documentation on Read the Docs.
+
+`Antora`_ is a static site generator for creating documentation sites from AsciiDoc content.
+
+Minimal configuration is required to build an existing Antora project on Read the Docs.
+
+.. code-block:: yaml
+   :caption: .readthedocs.yaml
+
+    version: 2
+
+    build:
+        os: ubuntu-lts-latest
+        tools:
+            nodejs: latest
+        jobs:
+          install:
+            - npm i -g @antora/[email protected] @antora/[email protected]
+          build:
+            html:
+              - antora --fetch antora-playbook.yml --to-dir $READTHEDOCS_OUTPUT/html
+
+.. _Antora: https://antora.org/
+
+Getting Started
+---------------
+
+- If you have an existing Antora project you want to host on Read the Docs, check out our :doc:`/intro/add-project` guide.
+- If you're new to Antora, check out the official `Getting Started with Antora`_ guide.
+
+.. _Getting Started with Antora: https://docs.antora.org/antora/latest/install-and-run-quickstart/
+
+Example Repository and Demo
+---------------------------
+
+Example repository
+    https://github.com/readthedocs/test-builds/tree/antora
+
+Demo
+    https://test-builds.readthedocs.io/en/antora/
+
+Further Reading
+---------------
+
+* `Antora documentation`_
+
+.. _Antora documentation: https://docs.antora.org/antora/latest/

docs/user/intro/doctools.rst

@@ -24,7 +24,6 @@ Below is a list of popular documentation tools that you can use to write your do
         Written in
              :bdg-info:`python`
 
-
     .. grid-item-card::  Sphinx
         :link: sphinx.html
 
@@ -35,7 +34,7 @@ Below is a list of popular documentation tools that you can use to write your do
         Written in
              :bdg-info:`python`
 
-    .. grid-item-card::  Docusarus
+    .. grid-item-card::  Docusaurus
         :link: docusaurus.html
 
         Docusaurus is a static-site generator that builds a single-page application with fast client-side navigation and out-of-the-box documentation features.
@@ -65,6 +64,16 @@ Below is a list of popular documentation tools that you can use to write your do
         Written in
              :bdg-info:`rust`
 
+    .. grid-item-card::  Antora
+        :link: antora.html
+
+        Antora is a static site generator for creating documentation sites from AsciiDoc content.
+
+        Supported formats
+             :bdg-success:`adoc`
+        Written in
+             :bdg-info:`javascript`
+
 .. toctree::
    :hidden:
 
@@ -73,3 +82,4 @@ Below is a list of popular documentation tools that you can use to write your do
    /intro/docusaurus
    /intro/markdoc
    /intro/mdbook
+   /intro/antora