Nominate contributor role for Renesas RZ Platform

[tiennguyenzg]

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

Provide the following information about the GitHub user:

1. Full Name: Tien Nguyen
2. GitHub Username: @tiennguyenzg
3. Organization (optional): Renesas

Supporting Documents

Add links to 3-5 GitHub pull requests, in the Zephyr project, authored or
reviewed by the GitHub user that demonstrate the user's dedication to the
Zephyr project.

#88569
#89722
#90116
#91394
#92763

[github-actions]

Hi @tiennguyenzg! We appreciate you submitting your first issue for our open-source project. 🌟

Even though I'm a bot, I can assure you that the whole community is genuinely grateful for your time and effort. 🤖💙