Add REST API and Golang Examples for Sending Emails/Others via Azure Communication Services

there are examples for JS and .net like communication-services-javascript-quickstarts
## Description
There is a noticeable lack of detailed examples and documentation for using the REST API and Golang with Azure Communication Services to send emails. This issue aims to request the creation of comprehensive guides and examples similar to the existing JavaScript quickstarts, but tailored for Golang and REST API usage.

## Issue Type
- [x] feature request

## Minimal Steps to Reproduce
Not applicable as this is a documentation and example request.

## Log Messages
Not applicable.

## Expected/Desired Behavior
Provision of REST API examples and Golang documentation that includes:
- Authentication methods
- Request headers and bodies setup
- Response handling

## OS and Version
Not applicable.

## Versions
Not applicable.

## Additional Details
These resources will enable developers to integrate email functionalities using Golang or direct API calls effectively, enhancing the utility of Azure Communication Services in diverse development environments.

Comienza revisando los quickstarts existentes de JavaScript en este repositorio y la documentación de la API REST de email de Azure Communication Services. Crea ejemplos comparables en Go y REST que cubran la autenticación, los encabezados y cuerpos de las solicitudes, y el manejo de las respuestas. La tarea estará terminada cuando los nuevos ejemplos y la documentación muestren claramente cómo enviar emails a través de ambas interfaces.

Escrito por el modelo de indexación a partir del texto del issue.