chore/COMPASS-9483 expose convert edge and node utils (#78)

Author: mabaasit

src/index.ts

@@ -1,5 +1,7 @@
 export * from '@/components/diagram';
 export * from '@/utilities/apply-layout';
+export { convertToExternalEdge as mapEdgeToDiagramEdge } from '@/utilities/convert-edges';
+export { convertToExternalNode as mapNodeToDiagramNode } from '@/utilities/convert-nodes';
 export * from '@/utilities/add-nodes-within-bounds';
 export * from '@/types';
 export {
@@ -8,4 +10,5 @@ export {
   useOnSelectionChange,
   getNodesBounds,
   getViewportForBounds,
+  type ReactFlowInstance as DiagramInstance,
 } from '@xyflow/react';