refactor(base): import preview-resolver part from central location

packages/@sanity/base/src/components/Preview.tsx

@@ -0,0 +1,21 @@
+import React from 'react'
+import {SchemaType} from '@sanity/types'
+import {previewResolver as resolvePreview} from '../legacyParts'
+
+interface PreviewProps {
+  layout?: string
+  value?: unknown
+  type: SchemaType
+}
+
+export default function Preview(props: PreviewProps) {
+  const {type, value, layout} = props
+
+  const PreviewComponent = resolvePreview(type)
+
+  return PreviewComponent ? (
+    <PreviewComponent type={type} value={value} layout={layout} />
+  ) : (
+    <div>No preview for {JSON.stringify(value)}</div>
+  )
+}

packages/@sanity/base/src/legacyParts.ts

@@ -0,0 +1,6 @@
+// @todo: remove the following line when part imports has been removed from this file
+///<reference types="@sanity/types/parts" />
+
+import previewResolver from 'part:@sanity/base/preview-resolver?'
+
+export {previewResolver}

packages/@sanity/base/src/preview/components/RenderPreviewSnapshot.tsx

@@ -1,12 +1,9 @@
-// @todo: remove the following line when part imports has been removed from this file
-///<reference types="@sanity/types/parts" />
-
 import React from 'react'
-import customResolver from 'part:@sanity/base/preview-resolver?'
+import {isReferenceSchemaType} from '@sanity/types'
 import {get} from 'lodash'
+import {previewResolver as customResolver} from '../../legacyParts'
 import {Type} from '../types'
 import SanityDefaultPreview from './SanityDefaultPreview'
-import {isReferenceSchemaType} from '@sanity/types'
 
 // Set this to true for debugging preview subscriptions
 const DEBUG = false