[Feature] Module Migration & CLI Reorganization

[djm81]

Feature: Module Migration & CLI Reorganization

Parent Epic: #194 Architecture (CLI structure, modularity, performance)

Groups the full module migration sequence: categorization, bundle extraction, core slimming, shim removal, decoupling cleanup, and test migration.

Child User Stories

• [Change] module-migration-01 - Module Grouping and Category Command Groups #315 — module-migration-01 (categorize and group) — closed
• [Change] module-migration-02 - Bundle Extraction and Marketplace Publishing #316 — module-migration-02 (bundle extraction) — closed
• [Change] module-migration-03 - Core Package Slimming and Mandatory Profile Selection #317 — module-migration-03 (core slimming) — closed
• [Change] module-migration-04 - Remove Flat Shims — Category-Only CLI (0.40.x) #330 — module-migration-04 (remove flat shims) — closed
• [Change] module-migration-06 - Core Decoupling Cleanup After Module Extraction #338 — module-migration-06 (core decoupling cleanup) — closed
• [Change] module-migration-07 - Test Migration Cleanup After Core Slimming #339 — module-migration-07 (test migration cleanup) — closed