Add Shuffle integration section

[fdalmaup]

Description

This PR closes #5639, which is part of https://github.com/wazuh/wazuh/issues/15034. It adds the Shuffle native integration section in the Integration with external APIs page of the documentation.

Checks

• [x] Compiles without warnings.
• [x] Uses present tense, active voice, and semi-formal registry.
• [x] Uses short, simple sentences.
• [x] Uses bold for user interface elements, italics for key terms or emphasis, and code font for Bash commands, file names, REST paths, and code.
• [x] Uses three spaces indentation.
• [x] Adds or updates meta descriptions accordingly.
• [x] Updates the redirect.js script if necessary (check this guide).