feat(example): create README

Author: stantanasi

Diff for: example/README.md

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+# JSON:API Client Example
+
+This folder contains example to demonstrate the usage of the [`@stantanasi/jsonapi-client`](https://www.npmjs.com/package/@stantanasi/jsonapi-client) package
+
+Refer to [`./src/index.ts`](./src/index.ts) and other files for example usage
+
+## Getting started
+
+### Prerequisites
+
+- Install [Node.js](https://nodejs.org) which includes [Node Package Manager](https://www.npmjs.com/get-npm)
+
+### Setup
+
+Install the packages required
+
+```bash
+npm install
+```
+
+## Development
+
+Run the application
+
+```bash
+npm run start
+```
+
+You can freely modify [`./src/index.ts`](./src/index.ts) and other files to test
+
+## Author
+
+- [Lory-Stan TANASI](https://github.com/stantanasi)
+
+## License
+
+This project is licensed under the `Apache-2.0` License - see the [LICENSE](LICENSE) file for details
+
+<p align="center">
+  <br />
+  © 2025 Lory-Stan TANASI. All rights reserved
+</p>