Feature: Add README.md.

README.md

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+![](./assets/luau-logo.svg)
+
+# Luau language grammar for programming under the [Roblox Platform](https://devforum.roblox.com/) [view the Luau language here](https://luau-lang.org/)
+
+[![NPM](https://nodei.co/npm/highlightjs-luau.png)](https://www.npmjs.com/package/highlightjs-luau)
+
+[![npm](https://img.shields.io/npm/v/highlightjs-luau)](https://www.npmjs.com/package/highlightjs-luau)
+[![npm](https://img.shields.io/npm/dt/highlightjs-luau)](https://www.npmjs.com/package/highlightjs-luau)
+![install size](https://badgen.net/packagephobia/install/highlightjs-luau)
+[![GitHub](https://img.shields.io/github/license/highlightjs/highlightjs-luau)](https://github.com/robloxiandemo/highlightjs-luau/blob/main/LICENSE.md)
+![Snyk Vulnerabilities for npm package](https://img.shields.io/snyk/vulnerabilities/npm/highlightjs-luau)
+[![CDN download](https://badgen.net/badge/jsDelivr/download/blue?icon=jsdelivr)](https://cdn.jsdelivr.net/npm/highlightjs-luau/dist/luau.min.js)
+
+## Usage
+
+Simply include the Highlight.js library in your webpage or Node app, then load this module. For more complex usage, see [highlight.js usage](https://github.com/highlightjs/highlight.js#basic-usage).
+
+### Static website or simple usage
+
+Simply load this module after loading Highlight.js. You'll use the minified version found in the `dist` directory. This module is just a CDN build of the language, so it will register itself as the Javascript is loaded.
+
+```html
+<script type="text/javascript" src="/path/to/highlight.min.js"></script>
+<script
+	type="text/javascript"
+	charset="UTF-8"
+	src="/path/to/highlightjs-luau/dist/luau.min.js"></script>
+<script type="text/javascript">
+	hljs.registerLanguage('luau', hljsDefineLuau);
+	hljs.highlightAll();
+</script>
+```
+
+## License
+
+Highlight.js is released under the BSD 3-Clause License. See [LICENSE](https://github.com/highlightjs/highlight.js/blob/main/LICENSE) file for details.
+Highlightjs-luau is released under the MIT License. See [LICENSE](/LICENSE.md) file for details.
+
+## Author
+
+Robloxian Demo [https://github.com/RobloxianDemo](https://github.com/RobloxianDemo)
+
+## Contribution
+
+Feel free to create issues or (even better) pull requests.
+
+## Links
+
+- The official site for the Highlight.js library is <https://highlightjs.org/>.
+- The Highlight.js GitHub project: <https://github.com/highlightjs/highlight.js>
+- Learn more about the Luau language: <https://luau-lang.org/why>