Collect agent information

[dareste]

Proposed changes

This change allows the supportpkg for NIC to collect nginx agent information, namely:

• Version.
• Config file.

Implements #149

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING guide
• I have proven my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have ensured the README is up to date
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch on my own fork