refactor(controls): move controls into own package and replace in examples

packages/core/src/components/ReactFlowProvider/index.tsx

@@ -0,0 +1,11 @@
+import React, { FC, PropsWithChildren } from 'react';
+
+import { Provider, createStore } from '../../store';
+
+const ReactFlowProvider: FC<PropsWithChildren<{}>> = ({ children }) => (
+  <Provider createStore={createStore}>{children}</Provider>
+);
+
+ReactFlowProvider.displayName = 'ReactFlowProvider';
+
+export default ReactFlowProvider;