fix: Flow not properly pre-loading state

* pass key to initFlow to possibly find a pre-existing state

Signed-off-by: Braks <78412429+bcakmakoglu@users.noreply.github.com>

src/composables/useVueFlow.ts

@@ -2,7 +2,7 @@ import useStore from './useStore'
 import useHooks from './useHooks'
 import { EmitFunc, FlowOptions, FlowStore } from '~/types'
 
-export const initFlow = (emit: EmitFunc, store = useStore()) => {
+export const initFlow = (emit: EmitFunc, key?: string, store = useStore(undefined, key)) => {
   useHooks(store, emit)
   return store
 }