refactor(core): move GetFormValueContext to singletons

packages/sanity/src/_singletons/form/GetFormValueContext.ts

@@ -0,0 +1,13 @@
+import type {Path} from '@sanity/types'
+import {createContext} from 'react'
+
+/**
+ * @internal
+ * @hidden
+ */
+export type GetFormValueContextValue = (path: Path) => unknown
+
+/**
+ * @internal
+ */
+export const GetFormValueContext = createContext<GetFormValueContextValue | null>(null)

packages/sanity/src/_singletons/index.ts

@@ -8,3 +8,4 @@ export * from './field/diff/DocumentChangeContext'
 export * from './form/DocumentIdContext'
 export * from './form/FormBuilderContext'
 export * from './form/FormValueContext'
+export * from './form/GetFormValueContext'

packages/sanity/src/core/form/contexts/GetFormValue.tsx

@@ -1,17 +1,10 @@
 import {type Path} from '@sanity/types'
-import {createContext, type ReactNode, useCallback, useContext, useRef} from 'react'
+import {type ReactNode, useCallback, useContext, useRef} from 'react'
+import {GetFormValueContext} from 'sanity/_singletons'
 
 import {getValueAtPath} from '../../field'
 import {type FormDocumentValue} from '../types'
 
-/**
- * @internal
- * @hidden
- */
-export type GetFormValueContextValue = (path: Path) => unknown
-
-const GetFormValueContext = createContext<GetFormValueContextValue | null>(null)
-
 /**
  *
  * @internal