Add documentation for Wazuh dashboard Packages generation

[yenienserrano]

Description

This PR adds documentation for the generation of Wazuh dashboard packages.

Checks

Docs building

• Compiles without warnings.

Code formatting and web optimization

• Uses three spaces indentation.
• Adds or updates meta descriptions accordingly.
• Updates the redirects.js script if necessary (check this guide).

Writing style

• Uses present tense, active voice, and semi-formal registry.
• Uses short, simple sentences.
• Uses bold for user interface elements, italics for key terms or emphasis, and code font for Bash commands, file names, REST paths, and code.

[rauldpm]

Please use the correct branch convention, and create a new PR with the correct branch naming, check the following documentation:

• https://sites.google.com/wazuh.com/devel/tools/github/branches