Align UNSAFE history exports (#14663)

Author: brophdawg11

.changeset/friendly-moose-argue.md

@@ -0,0 +1,5 @@
+---
+"react-router": patch
+---
+
+Export `UNSAFE_createMemoryHistory` and `UNSAFE_createHashHistory` alongside `UNSAFE_createBrowserHistory` for consistency. These are not intended to be used for new apps but intended to help apps usiong `unstable_HistoryRouter` migrate from v6->v7 so they can adopt the newer APIs.

packages/react-router/index.ts

@@ -349,7 +349,9 @@ export type {
 
 /** @internal */
 export {
+  createMemoryHistory as UNSAFE_createMemoryHistory,
   createBrowserHistory as UNSAFE_createBrowserHistory,
+  createHashHistory as UNSAFE_createHashHistory,
   invariant as UNSAFE_invariant,
 } from "./lib/router/history";