refactor(types)!: Remove elements prop, change EdgeTypes/NodeTypes prop to string[]

* no more elements prop - v-model instead!
* Instead of passing an object map to components just pass in an array of strings as nodeTypes/edgeTypes object
* the string name will either be resolved to a dynamic component with :is="type" or a slot with the type-name
* update all examples

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

src/types/node.ts

@@ -58,5 +58,5 @@ export interface NodeProps<T = any> {
   dragging?: boolean
 }
 
-export type NodeType = Component<NodeProps> | DefineComponent<NodeProps, any, any, any, any> | boolean
-export type NodeTypes = Record<string, NodeType>
+export type NodeComponent = Component<NodeProps> | DefineComponent<NodeProps, any, any, any, any> | string
+export type NodeTypes = string[]