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)

eslint.config.ts

@@ -18,7 +18,7 @@ export default defineConfig([
       'src/scripts/*',
       'src/extensions/core/*',
       'src/types/vue-shim.d.ts',
-      'src/types/comfyRegistryTypes.ts',
+      'packages/registry-types/src/comfyRegistryTypes.ts',
       'src/types/generatedManagerTypes.ts',
       '**/vite.config.*.timestamp*',
       '**/vitest.config.*.timestamp*'