feat(demo): add story 1 — Sorano: Rock and Time

plugins/email/api-docs/chapter.md

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+---
+title: Email
+template: chapter
+description: Send emails via the Grav API
+taxonomy:
+    category:
+        - docs
+---
+
+The Email API allows you to send ad-hoc emails and test your email configuration programmatically. These endpoints are registered by the Email plugin via the Grav API plugin's extensibility system.
+
+## Requirements
+
+- [Grav API Plugin](https://github.com/getgrav/grav-plugin-api) must be installed and enabled
+- Email plugin must be installed, enabled, and configured with a valid mailer
+
+## Authentication
+
+All email endpoints require the `api.system.write` permission.
+
+## Available Operations
+
+| Method | Endpoint | Description |
+|--------|----------|-------------|
+| POST | `/email/send` | Send an ad-hoc email |
+| POST | `/email/test` | Send a test email to verify configuration |