Add toolhive-registry to RFC

toolhive-registry heavily imports from toolhive:
- pkg/logger
- pkg/permissions
- pkg/registry/*
- pkg/container/verifier

Added to code sharing table, implementation tracking, and consumer
migration plan.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: JAORMX

rfcs/THV-0032-toolhive-core-shared-library.md

@@ -25,6 +25,7 @@ Additionally, TypeScript projects exist (toolhive-studio, toolhive-cloud-ui) but
 | Project | Imports from toolhive | Pattern Divergence |
 |---------|----------------------|-------------------|
 | **dockyard** | `pkg/logger`, `pkg/container/images`, `pkg/runner` | Aligned - uses toolhive utilities |
+| **toolhive-registry** | `pkg/logger`, `pkg/permissions`, `pkg/registry/*`, `pkg/container/verifier` | Aligned - heavily uses toolhive utilities |
 | **toolhive-registry-server** | Only `pkg/versions` + `pkg/registry` types | Uses stdlib `log/slog` instead of toolhive's zap logger; custom error handling |
 
 **Current limitations:**
@@ -387,6 +388,7 @@ import "github.com/stacklok/toolhive-core/logger"
 
 - Update `toolhive` to import from `toolhive-core`
 - Update `dockyard` to import from `toolhive-core` (currently imports `pkg/logger`, `pkg/container/images`, `pkg/runner`)
+- Update `toolhive-registry` to import from `toolhive-core` (currently imports `pkg/logger`, `pkg/permissions`, `pkg/registry/*`)
 - Offer `toolhive-registry-server` the option to adopt toolhive-core (may choose to continue with slog)
 - Deprecate original packages with forwarding imports
 - Monitor for issues and release patches as needed
@@ -475,4 +477,5 @@ import "github.com/stacklok/toolhive-core/logger"
 | toolhive-core | N/A | Not started |
 | toolhive | N/A | Not started |
 | dockyard | N/A | Not started |
+| toolhive-registry | N/A | Not started |
 | toolhive-registry-server | N/A | Optional - may continue using slog |