fix(store): correct injection and remove id from refs

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

src/composables/useVueFlow.ts

@@ -2,8 +2,7 @@ import useStore from './useStore'
 import useHooks from './useHooks'
 import { EmitFunc, FlowStore } from '~/types'
 
-let key = 0
-export const initFlow = (emit: EmitFunc, id = `vue-flow-${key++}`): FlowStore => {
+export const initFlow = (emit: EmitFunc, id?: string): FlowStore => {
   const store = useStore({ id })
   useHooks(store, emit)
   return store