docs: add documentation to main repository

docs/cloud/overview.mdx

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+---
+title: "Introduction"
+description: "Managed security testing without local setup"
+---
+
+Skip the setup. Run Strix in the cloud at [app.usestrix.com](https://app.usestrix.com).
+
+## Features
+
+<CardGroup cols={2}>
+  <Card title="No Setup Required" icon="cloud">
+    No Docker, API keys, or local installation needed.
+  </Card>
+  <Card title="Full Reports" icon="file-lines">
+    Detailed findings with remediation guidance.
+  </Card>
+  <Card title="Team Dashboards" icon="users">
+    Track vulnerabilities and fixes over time.
+  </Card>
+  <Card title="GitHub Integration" icon="github">
+    Automatic scans on pull requests.
+  </Card>
+</CardGroup>
+
+## What You Get
+
+- **Penetration test reports** — Validated findings with PoCs
+- **Shareable dashboards** — Collaborate with your team
+- **CI/CD integration** — Block risky changes automatically
+- **Continuous monitoring** — Catch new vulnerabilities quickly
+
+## Getting Started
+
+1. Sign up at [app.usestrix.com](https://app.usestrix.com)
+2. Connect your repository or enter a target URL
+3. Launch your first scan
+
+<Card title="Try Strix Cloud" icon="rocket" href="https://app.usestrix.com">
+  Run your first pentest in minutes.
+</Card>