Add rh9 to the wazuh install

[cbaxley]

We need to add rh9 instructions for the wazuh install.
We will also need to test it.

content/docs/markdown/agents/wazuh-agent-management.md
Major section missing Red Hat support:
Line 97: Section titled "Steps to Enroll a Wazuh Agent (Debian-Based Systems)" - needs equivalent Red Hat section
Lines 108-139: All commands use apt-get, repository setup is Debian-specific - needs complete Red Hat equivalent section