Extract registry types into workspace package (#5840)

## Summary

Extracts ComfyUI registry types into a dedicated workspace package for
better modularity.

## Changes

- **What**: Created `@comfyorg/registry-types` package to house
generated type definitions
- **Breaking**: None - maintains backward compatibility through
re-exports at original path
- **Dependencies**: Added `@comfyorg/registry-types` as workspace
dependency

## Review Focus

Is this the right granularity for package extraction, or should registry
types be part of a larger shared package?

PR split into two tiny diffs:
- [Part
one](f8d3d2fa01)
- [Part
two](f8d3d2fa01..c48ca84336)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5840-Extract-registry-types-into-workspace-package-27c6d73d365081dbb824d680ce739316)
by [Unito](https://www.unito.io)

knip.config.ts

@@ -18,6 +18,10 @@ const config: KnipConfig = {
     'packages/design-system': {
       entry: ['src/**/*.ts'],
       project: ['src/**/*.{js,ts}', '*.{js,ts,mts}']
+    },
+    'packages/registry-types': {
+      entry: ['src/comfyRegistryTypes.ts'],
+      project: ['src/**/*.{js,ts}']
     }
   },
   ignoreBinaries: ['python3'],
@@ -34,7 +38,7 @@ const config: KnipConfig = {
   ignore: [
     // Auto generated manager types
     'src/workbench/extensions/manager/types/generatedManagerTypes.ts',
-    'src/types/comfyRegistryTypes.ts',
+    'packages/registry-types/src/comfyRegistryTypes.ts',
     // Used by a custom node (that should move off of this)
     'src/scripts/ui/components/splitButton.ts'
   ],