Add GitlabApiClient and GitlabCLI in the applications supporting GitLab list

Description

Add GitlabApiClient and GitlabCLI in the applications supporting GitLab list.

Proposal

I've created few projects using GitLab and I'd like them to be added into https://about.gitlab.com/applications/.

  1. Name: GitLabApiClient
    Link: https://github.com/nmklotas/GitLabApiClient
    Description: .NET standard 2.0 client library for GitLab API v4.

  2. Name: GitLabCLI
    Link: https://github.com/nmklotas/GitLabCLI
    Description: It's a cross platform, self contained command line tool to quickly & naturally perform frequent tasks on GitLab projects.

Overview

Why GitLabApiClient?
All existing .NET rest clients are incomplete or full of bugs or has some serious defects or are no longer maintained, not working with V4 or don't support .NET standard. So I've created new library targeting that will be maintained, it's pretty stable and covered with tests. Currently it supports these GitLab V4 apis:
https://github.com/nmklotas/GitLabApiClient#currently-supported-gitlab-apis

Why GitLabCLI?
I wanted to create a tool to be able perform frequent GitLab tasks mostly focused on issues and merge requests without leaving the command line. Did not find anything like it that was very simple, fast, enhanced my productivity and was self contained + cross platform, so GitLabCLI was born. For ex. creating issue can be that simple:
gitlab issue create --title "Your title" --description "Your description"
More examples:
https://github.com/nmklotas/GitLabCLI#some-examples