Add a facet search per section

[gmourier]

Pull Request

Related issue

Fixes #3278

What does this PR do?

• Introduce facets selection to narrow down the sections search (learn, guides, reference)
• Leverage federated search feature to boost results other than the error codes page ones, that tend to be brought up often

PR checklist

Please check if your PR fulfills the following requirements:

• Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
• Have you read the contributing guidelines?
• Have you made sure that the title is accurate and descriptive of the changes?

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