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)

packages/registry-types/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "@comfyorg/registry-types",
+  "version": "1.0.0",
+  "description": "Comfy Registry API TypeScript types",
+  "packageManager": "pnpm@10.17.1",
+  "type": "module",
+  "exports": {
+    ".": "./src/comfyRegistryTypes.ts"
+  },
+  "nx": {
+    "tags": [
+      "scope:shared",
+      "type:types"
+    ]
+  }
+}

packages/registry-types/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "dist"
+  },
+  "include": ["src/**/*"]
+}