fix!: props and composable not merging together properly

* Add getter for node/edge types
* change nodeTypes prop type to only Record<string, NodeType> - same for edges
* Add rgb example
* remove v-model for elements

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

examples/Provider/ProviderExample.vue

@@ -11,7 +11,7 @@ import {
   Edge,
   Elements,
   ConnectionMode,
-  useStore,
+  useVueFlow,
 } from '~/index'
 
 import './provider.css'
@@ -28,7 +28,7 @@ const initialElements: Elements = [
   { id: 'e1-3', source: '1', target: '3' },
 ]
 
-useStore()
+useVueFlow()
 const elements = ref<Elements>(initialElements)
 const onConnect = (params: Connection | Edge) => (elements.value = addEdge(params, elements.value))
 const onElementsRemove = (elementsToRemove: Elements) => (elements.value = removeElements(elementsToRemove, elements.value))