Documenting the `journald` Log Collection Mechanism in Wazuh

[JcabreraC]

Epic	Wazuh version	Component
https://github.com/wazuh/wazuh/issues/12862	4.9.0	Logcollector

Description

This issue focuses on documenting the log collection mechanism for journald logs in Wazuh, explaining how Logcollector processes and filters these logs. The documentation will provide insights into the operational aspects of journald log collection, enhancing user understanding of the feature.

Objectives

• Describe the journald Collection Process: Elaborate on how Wazuh's Logcollector interacts with journald to collect logs.
• Operational Details: Explain the internal workings, including the handling of journald logs, filtering mechanisms, and the integration with Wazuh's analysis pipeline.
• Practical Use Cases: Illustrate how journald log collection can be leveraged in various scenarios to enhance monitoring and analysis.

Tasks

• [ ] Develop a comprehensive section on the journald log collection mechanism within Wazuh's documentation.
• [ ] Detail the process of collecting, filtering, and processing journald logs for analysis.
• [ ] Include use cases and examples to demonstrate the application and benefits of journald log collection.

Acceptance Criteria

• The documentation provides a clear and thorough explanation of the journald log collection mechanism in Wazuh.
• Users gain a deep understanding of how journald logs are collected, filtered, and utilized within Wazuh.
• The documentation serves as a valuable resource for users looking to implement or optimize journald log collection in their environments.

Assigned: @wazuh/marketing-content

[JcabreraC]

Remember to update the reference documentation link: https://github.com/wazuh/wazuh-documentation/pull/7202/files/#diff-e3ef5b5cab82e01e62bcfe3782d345c506b27c97689d5245a63c6b59e27dacdaR342