types(runtime-vapor): add VaporKeepAliveContext type export

packages/runtime-vapor/src/index.ts

@@ -82,3 +82,4 @@ export { VaporTransitionGroup } from './components/TransitionGroup'
 export type { VaporComponent, VaporComponentOptions } from './component'
 export type { VaporSlot } from './componentSlots'
 export type { VaporTransitionHooks } from './block'
+export type { VaporKeepAliveContext } from './components/KeepAlive'