www/grafanactl: Add grafanactl 0.1.9
Grafana CLI (grafanactl) is a command-line tool designed to simplify interaction
with Grafana instances.
It enables users to authenticate, manage multiple environments, and perform
administrative tasks through Grafana's REST API -- all from the terminal.
Whether you're automating workflows in CI/CD pipelines or switching between
staging and production environments, Grafana CLI provides a flexible and
scriptable way to manage your Grafana setup efficiently.