Reorganize consensus logic modules

[delbonis]

Description

This moves some modules over to a new chaintsn crate from the consensus-logic crate as described in EXP-13. This isn't a complete reorganization as it described because I'm trying not to break too many things all at once.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature/Enhancement (non-breaking change which adds functionality or enhances an existing one)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactor

Checklist

• I have performed a self-review of my code.
• I have commented my code where necessary.
• I have updated the documentation if needed.
• My changes do not introduce new warnings.
• I have added tests that prove my changes are effective or that my feature works.
• New and existing tests pass with my changes.

Related Issues

• EXP-13

[delbonis]

Is there anything else that it makes sense to move right now? I feel like I should move around some of the modules in state too, splitting apart the state types from the chain types, but that feels like maybe too much? And moving IDs and stuff into the primitives crate.

[Rajil1213]

Left a few nits.

Is there anything else that it makes sense to move right now? I feel like I should move around some of the modules in state too, splitting apart the state types from the chain types, but that feels like maybe too much? And moving IDs and stuff into the primitives crate.

I haven't worked actively with the CL crate to know which parts should be split but given the title of this PR, the number of changes in it and the corresponding issue description, I think a few more changes should be fine. I'm personally inclined to have these kinds of refactorings be done in one fell swoop and to face the rebasing issues altogether (ripping the bandaid and what-not). But I'm fine with whatever the rest of you decide.

[Rajil1213]

This one is failing to build as it's missing the trace import in the express-tsn/src/transition.rs. There are a couple of warnings too about unused stuff which we should silence with #![allow_unused] for the sake of clippy.