Feat: basic keyboard controls and better WAI-ARIA defaults (#2333)

* feat(nodes): focusable and moveable with keys
* refactor(key-handling): cleanup, handle selections
* feat(edges): selectable with keys
* refactor(nodes-edges): cleanup keyboard controls and aria- attrs
* refactor(nodes): node needs to be selected for arrow keys
* refactor(minimap): create const for labelledby

closes #1033

examples/nextjs/pages/Edges/index.tsx

@@ -192,7 +192,7 @@ const EdgesFlow = () => {
   const [edges, setEdges, onEdgesChange] = useEdgesState(initialEdges);
   const onConnect = useCallback(
     (params: Connection | Edge) => setEdges((eds) => addEdge(params, eds)),
-    []
+    [setEdges]
   );
 
   return (