docs(other): respect usage article

[DmitryAnansky]

What/Why/How?

Added two first articles related to practical usage of the Respect command, using Code Walkthrough.
The idea is to provide a set of ready-to-use articles/templates connected to the Redocly Cafe API, allowing users to easily explore how it works and adopt them for similar use cases.

Reference

Testing

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Check yourself

• Code is linted
• Tested
• All new/updated code is covered with tests

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

[redocly]

marketing-site AI Review: 🟢 Completed

Reunite Bot has reviewed your changes and found 6 potential issue(s).

Note

Low Risk

The changes are entirely isolated to documentation and tutorial materials, introducing zero risk to the core system behavior.

Overview

Adds the first two articles of the "Respect tutorials" series using the Code Walkthrough feature:

• A guide on testing API contracts with Redocly Respect and Arazzo workflows.
• A guide on executing OAuth2 authorization flows with Arazzo to access protected API endpoints.

Includes ready-to-use OpenAPI and Arazzo example files for the Redocly Cafe API in the _filesets directory and updates the sidebars.yaml to include the new tutorial section.