📚 Add readme for library directory

library/README.md

@@ -0,0 +1,80 @@
+# Penpot Library
+
+A library that exposes a limited set of Penpot's features for
+programmatic use. Currently, it provides methods to build Penpot files
+in memory and export them as .penpot files (ZIP archives containing
+all the necessary data to import them into a Penpot application).
+
+## User Guide
+
+### How to install
+
+```bash
+yarn add @penpot/library
+```
+
+### Example of use
+
+```js
+import * as penpot from "@penpot/library";
+import { createWriteStream } from 'fs';
+import { Writable } from "stream";
+
+const context = penpot.createBuildContext();
+
+
+context.addFile({name: "Test File 1"});
+context.addPage({name: "Foo Page"});
+
+context.addBoard({
+  name: "Foo Board",
+  x: 0,
+  y: 0,
+  width: 500,
+  height: 300,
+});
+
+context.closeBoard();
+context.closeFile();
+
+// Create a file stream to write the zip to
+const output = createWriteStream('sample-stream.zip');
+
+// Wrap Node's stream in a WHATWG WritableStream
+const writable = Writable.toWeb(output);
+await penpot.exportStream(context, writable);
+```
+
+## Developer Guide
+
+### How to publish
+
+Build the library:
+
+```bash
+yarn run build
+```
+
+Login on npm:
+
+```bash
+yarn npm login
+```
+
+Publish on npm:
+
+
+```bash
+yarn npm publish --access public
+```
+
+## License
+
+```
+This Source Code Form is subject to the terms of the Mozilla Public
+License, v. 2.0. If a copy of the MPL was not distributed with this
+file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Copyright (c) KALEIDOS INC
+```
+