Add Alinea to headless CMS section (#1028)

Author: benmerckx

src/site/headless-cms/alinea.md

@@ -0,0 +1,49 @@
+---
+title: Alinea
+repo: alineacms/alinea
+homepage: https://alineacms.com
+twitter: alineacms
+opensource: "Yes"
+typeofcms: "Git + API"
+supportedgenerators:
+  - All
+description: Open source headless CMS with minimal setup. Fully typed content 
+  right in your repository.
+images:
+  - path: /img/cms/alinea.png
+---
+
+[Alinea](https://alineacms.com) is an open-source headless CMS that allows you to define your content schema in code, making it easy to manage and version your content directly in your repository. It provides a minimal setup with no databases or migrations, and offers a fully typed experience for developers.
+
+<br />
+
+## Quickstart
+
+Get started with Alinea in existing projects:
+
+<br />
+
+```sh
+npm install alinea
+npx alinea init
+```
+
+<br />
+
+Read more in the docs: [Alinea Documentation](https://alineacms.com/docs/getting-started)
+
+<br />
+
+### Key features
+
+- **Minimal setup**: Define your schema in code — no databases, no migrations, no CLI scaffolding. Just TypeScript.
+- **Git-based content**: Content lives in your repository, version-controlled and easy to branch for testing or collaboration.
+- **Fully typed**: Enjoy type-safe content queries and schema definitions with no codegen or tooling overhead.
+- **Intuitive structure**: Organize content in a hierarchical tree that makes sense to both developers and editors.
+- **Live previews**: See content changes in real time, including support for React Server Components.
+- **Editorial workflow**: Manage drafts, publish with control, and archive old entries — all with built-in visual feedback.
+- **Query engine**: Fetch exactly the data you need using a developer-friendly API — filtered, sorted, paginated.
+- **Custom fields**: Extend the CMS with your own field types tailored to your project needs.
+- **Internationalization**: Build multilingual experiences out of the box.
+- **Workspaces**: Easily support multiple environments or project areas.
+- **Self-host or cloud**: You decide how and where Alinea runs.