Set up a clear roadmap using GitHub milestones

I propose 2-4pm Friday as a video call go over the flex issue tracker and close out dangling issues and discuss face to face stuff like https://github.com/TypeNetwork/Roboto-Flex/issues/77

My aim is to have clearer roadmap using GitHub issue tracker milestones.

Filing this issue to meta-track :)

Review the current GitHub issue tracker, milestones, and the linked issue 77 before the proposed discussion. The intended outcome is a clearer roadmap organized through GitHub issue milestones, but the issue does not define the milestone structure or specific issues to include.

Written by the indexing model from the issue text.