Refactor systemctl services and categories due to alarm bugs

This commit restructures systemctl service definitions and category mappings.

Motivation: Alarm-related bugs revealed inconsistencies in service and role handling.

Preparation step: lays the groundwork for fixing the alarm issues by aligning categories, roles, and service templates.

roles/sys-ctl-alm-email/README.md

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+# Automated Email Alerts for Service Failures
+
+## Description
+
+This role installs and configures the necessary components for sending email notifications via systemd when a service fails. It sets up the `sys-ctl-alm-email` service and configures email parameters and templates using msmtp.
+
+## Overview
+
+Optimized for secure and reliable service failure notifications, this role is an integral part of the overall `sys-ctl-alm-compose` suite. It ensures that, upon failure of a critical service, an email alert is sent automatically to enable prompt troubleshooting.
+
+## Purpose
+
+The primary purpose of this role is to provide a comprehensive solution for automated email notifications in a systemd environment. By integrating with msmtp and customizable templates, it delivers clear and timely alerts about service failures, thereby enhancing system reliability.
+
+## Features
+
+- **Service Installation & Configuration:** Installs msmtp and configures the email sending service.
+- **Customizable Templates:** Supports tailoring email templates for service failure notifications.
+- **Secure Notifications:** Integrates with systemd to trigger email alerts when services fail.
+- **Suite Integration:** Part of the `sys-ctl-alm-compose` suite, offering a unified approach to service failure notifications.
+
+## Other Resources
+
+This role was created as part of a conversation with OpenAI's ChatGPT and can be found [here](https://chat.openai.com/share/96e4ca12-0888-41c0-9cfc-29c0180f0dba).