add guidelines for handling major vs minor release

[capsulecorplab]

Desired outcomes

• guidelines for handling major vs minor release, albeit top-level assembly of papra or sub-assemblies (s.a., fan box or controller board) for maintainers of PAPRa project, and/or its subcomponents
• approach to facilitating version compatibility between CAD tools (s.a., Fusion360) and filesystem-based version control system (s.a., git) - e.g, creating and adding git commit in version description (preferably tagged as a milestone) in Fusion360 design history. moved to approach for keeping git commits and Fusion360 design history in sync papr-print-files#225