chore: add AGENTS.md (cloudscape-design#126)

* feat: add a simple AGENTS.md

* chore: link to conventions

* fix: add a centralized for components guide

* chore: improve file

* chore: update for clarity AGENTS.md

---------

Co-authored-by: Joan Perals <jotresse@amazon.com>

Author: amanabiy

AGENTS.md

@@ -0,0 +1,11 @@
+# AGENTS.md
+
+React component library for conversation-oriented UI in the Cloudscape Design System.
+
+## Setup
+
+This project uses npm.
+
+## Conventions
+
+This repository follows the same conventions as the [main Cloudscape components library](https://github.com/cloudscape-design/components). Refer to the [Cloudscape Components Guide](https://github.com/cloudscape-design/components/blob/main/docs/CLOUDSCAPE_COMPONENTS_GUIDE.md) for details on component structure, props, events, styling, testing, code style, dev pages, and API docs.