Add version ranges

e.g.

`Core(1.37) ... Core(1.49).includes( Core(1.39) )`

* Are Core and Full considered equal for the purpose of these ranges?
* Is `Full(1.49.0) in Core(1.37) ... Core(1.49)` true? And what about `Full(1.49.1) in Core(1.37) ... Core(1.49))`

Start by reviewing the repository's Rust version parsing and comparison entry points, then trace how version components are represented. Clarify the open questions about Core versus Full equality and range inclusivity before implementing behavior, and use the examples in the issue as acceptance cases.

Written by the indexing model from the issue text.