scale-telekom-header: Provide more detailed implementation examples

**Scale Version**
[3.0.0-beta.156](https://www.npmjs.com/package/@telekom/scale-components/v/3.0.0-beta.156)

**Framework and version**
[Nuxt 4.0.1](https://www.npmjs.com/package/nuxt/v/4.0.1)

**Documentation Request**
Please provide more detailed implementation examples for the scale-telekom-header and add full code examples.