refactor(flow): export useNodesState and useEdgesState separately from useVueFlow

* bind vueFlow instance to currentInstance when useVueFlow is called multiple times in a single setup call

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

src/index.ts

@@ -22,6 +22,7 @@ export { default as useZoomPanHelper } from './composables/useZoomPanHelper'
 export { default as useVueFlow } from './composables/useVueFlow'
 export { default as useHandle } from './composables/useHandle'
 export { default as useWindow } from './composables/useWindow'
+export * from './composables/useElementsState'
 
 export * from './additional-components'
 export * from './types'