Add Espressif Collaborators

[sylvioalves]

Background

The [TSC Project Roles] defines the main roles for the Zephyr Project, including
Maintainer, Collaborator, and Contributor.

By default anyone that contributes code or documentation is a Contributor, but
with the lowest [GitHub Permission Level] of Read. For example, Contributors
with Read permission do not have the permission to add reviewers to a pull
request.

Use this template to nominate a GitHub user for the Contributor role with
Triage permission level, which allows the user to add reviewers to a pull
request and be added as a reviewer by other users.

Nomination

GitHub User

Provide the following information about the GitHub user:

1. Raffael Rostagno
2. raffarost
3. Espressif Systems

Supporting Documents

#71165
#72427
#75379

1. Márcio Ribeiro
2. wmrsouza
3. Espressif Systems

Supporting Documents

#64931
#65970
#73228

[kartben]

+1 🥳

[nashif]

https://github.com/zephyrproject-rtos/zephyr/invitations