/claim #3960 Closes #3960

📑 Description

Nagios Provider Implementation

This PR adds support for Nagios monitoring system integration with Keep. The implementation allows users to:

• Fetch alerts from Nagios (both host and service status)
• Acknowledge host and service problems
• Enable/disable host and service checks
• Map Nagios severity levels to Keep’s alert severity system

Features

• Full integration with Nagios Core’s CGI API
• Support for both host and service monitoring
• Proper authentication handling
• Comprehensive error handling
• Follows Keep’s provider implementation patterns

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed

ℹ Additional Information