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>

src/types/types.ts

@@ -90,8 +90,8 @@ export type FlowInstance<T = any> = {
 
 export interface FlowOptions extends Omit<HTMLAttributes, 'onLoad'> {
   elements: Elements
-  nodeTypes?: Record<string, NodeType> | string[]
-  edgeTypes?: Record<string, EdgeType> | string[]
+  nodeTypes?: Record<string, NodeType>
+  edgeTypes?: Record<string, EdgeType>
   connectionMode?: ConnectionMode
   connectionLineType?: ConnectionLineType
   connectionLineStyle?: CSSProperties