Problem

Descriptions of experimental settings need the information on "experimentality" baked into the documentation, but this is double book keeping.

Example:

Given we merge #7798, that information can be displayed automatically, and removed without maintainer intervention if the feature becomes stable. It would also allow more convenient control over presentation, ensuring it will be consistent.

Proposal

• merge Documentation: list experimental features in manual #7798
• adapt the rendering helper for settings and the code outputting the structured data it works on accordingly

Checklist

• checked latest Nix manual (source)
• checked open documentation issues and pull requests for possible duplicates

Priorities

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