add basic condfig and rendering

src/lib/flowContext.tsx

@@ -0,0 +1,12 @@
+import React from 'react'
+
+export type FlowContextValue = {
+    nodes: any[]
+    setNodes: (updater: any) => void
+    edges: any[]
+    setEdges: (updater: any) => void
+}
+
+const FlowContext = React.createContext<FlowContextValue | null>(null)
+
+export default FlowContext