docs(project): add initial setup for docs publishing

docs/index.md

@@ -1,9 +1,55 @@
-# Index
+# Showdown documentation
 
-1. Options
+![Showdown][sd-logo]
-2. Subparsers
+
-3. [Event System](event_system.md)
+![Build Status: Linux](https://github.com/showdownjs/showdown/actions/workflows/node.linux.yml/badge.svg)
-    1. [Introduction](event_system.md#introduction)
+![Build Status: Windows](https://github.com/showdownjs/showdown/actions/workflows/node.win.yml/badge.svg)
-    2. [The Event Object](event_system.md#the-event-object)
+[![npm version](https://badge.fury.io/js/showdown.svg)](http://badge.fury.io/js/showdown)
-    3. [Events](event_system.md#events)
+[![Bower version](https://badge.fury.io/bo/showdown.svg)](http://badge.fury.io/bo/showdown)
-    4. [Events List](event_system.md#events-list)
+[![Join the chat at https://gitter.im/showdownjs/showdown](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/showdownjs/showdown?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.me/tiviesantos)
+
+Showdown is a JavaScript Markdown to HTML converter, based on the original works by John Gruber.
+Showdown can be used on the client-side (in the browser) or server-side (with Node.js).
+
+----
+
+## Live demo
+
+<http://demo.showdownjs.com/>
+
+ShowdownJS is a free library and it will remain free forever. However, maintaining and improving the library costs time and money.
+
+If you like our work and find it useful, please donate through [PayPal](https://www.paypal.me/tiviesantos).
+
+Your contributions are greatly appreciated and will help us with the development of this awesome library.
+
+## Who uses Showdown (or a fork)
+
+* [GoogleCloudPlatform](https://github.com/GoogleCloudPlatform)
+* [Meteor](https://www.meteor.com/)
+* [StackExchange](http://stackexchange.com/) - forked as [PageDown](https://code.google.com/p/pagedown/)
+* [docular](https://github.com/Vertafore/docular)
+* [md-page](https://github.com/oscarmorrison/md-page)
+* [QCObjects](https://qcobjects.dev)
+* [Antmarky](https://github.com/bandantonio/antmarky)
+* [and some others](https://www.npmjs.com/browse/depended/showdown)
+
+## License
+
+ShowdownJS v 2.0 is release under the MIT version.
+
+Previous versions are release under BSD.
+
+[sd-logo]: https://raw.githubusercontent.com/showdownjs/logo/master/dist/logo.readme.png
+[legacy-branch]: https://github.com/showdownjs/showdown/tree/legacy
+[releases]: https://github.com/showdownjs/showdown/releases
+[changelog]: https://github.com/showdownjs/showdown/blob/master/CHANGELOG.md
+[wiki]: https://github.com/showdownjs/showdown/wiki
+[cli-wiki]: https://github.com/showdownjs/showdown/wiki/CLI-tool
+[definitely-typed]: https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/showdown
+[xss-wiki]: https://github.com/showdownjs/showdown/wiki/Markdown's-XSS-Vulnerability-(and-how-to-mitigate-it)
+[ext-wiki]: https://github.com/showdownjs/showdown/wiki/extensions
+[coding-rules]: https://github.com/showdownjs/code-style/blob/master/README.md
+[ng-commit-guide]: https://github.com/showdownjs/code-style/blob/master/README.md#commit-message-convention
+[boilerplate-repo]: https://github.com/showdownjs/extension-boilerplate

mkdocs.yml

@@ -0,0 +1,19 @@
+site_name: Showdown documentation
+site_description: Showdown is a JavaScript Markdown to HTML converter
+
+theme:
+  name: material
+  logo: http://showdownjs.com/apple-touch-icon.png
+  favicon: http://showdownjs.com/apple-touch-icon.png
+  icon:
+    repo: fontawesome/brands/github
+  palette:
+    primary: red
+    accent: cyan
+
+repo_url: https://github.com/showdownjs/showdown
+repo_name: showdownjs/showdown
+site_dir: public
+
+nav:
+  - Home: index.md