Define roadmap

We have a bunch of future features described in the issues list, but currently no plan for when to add those. This has an impact on our IMM score, which reflects the fact that this is likely to reduce confidence in the project.

Define milestones indicating where these features will go.

Review the future-feature issues in the repository's issue list and identify how they should be grouped into milestones. Done means the project has published milestones that give those features an intended place in the roadmap and improve confidence in the project plan.

Written by the indexing model from the issue text.