refactor: migrate Verso Blueprint to the module system

[ejgallego]

This PR migrates the Verso Blueprint library and public authoring surface to Lean's module system, separating runtime, authoring, and meta dependencies so private implementation changes no longer invalidate downstream Blueprint modules.

• Require module declarations across all 101 production sources and make public, private, normal, and meta boundaries explicit.
• Split phase-neutral data leaves from authoring and rendering implementations while preserving the supported public root.
• Audit the legacy and candidate public-root surfaces and every Lake Shake finding, preserving intentional phase and metadata dependencies without widening helpers into public API.
• Convert the starter project to the module-system authoring and generator pattern, with fresh-project and incremental-edit coverage.
• Track refactor: convert Verso Slides to the module system verso-slides#73 at its current reviewed head for the final cutover.

Backport v4.33.0: pending