wip(grafana/ui): put back LayoutItemContext so vite builds

packages/grafana-ui/src/components/Layout/LayoutItemContext.ts

@@ -0,0 +1,21 @@
+import { createContext } from 'react';
+
+export interface LayoutItemContextProps {
+  boostZIndex(): () => void;
+}
+
+/**
+ * Provides an API for downstream components (e.g. within panels) to inform the layout
+ * that anchored tooltips or context menus could overflow the panel bounds. The layout
+ * system can then boost the z-index of items with any anchored contents to prevent the overflown
+ * content from rendering underneath adjacent layout items (e.g. other panels) that naturally
+ * render later/higher in the stacking order
+ *
+ * This is used by VizTooltips and Annotations, which anchor to data points or time range within
+ * the viz drawing area
+ *
+ * @internal
+ */
+export const LayoutItemContext = createContext<LayoutItemContextProps>({
+  boostZIndex: () => () => {},
+});

packages/grafana-ui/src/components/index.ts

@@ -284,6 +284,8 @@ export { Divider } from './Divider/Divider';
 export { getDragStyles, type DragHandlePosition } from './DragHandle/DragHandle';
 export { useSplitter } from './Splitter/useSplitter';
 
+export { LayoutItemContext, type LayoutItemContextProps } from './Layout/LayoutItemContext';
+
 /** @deprecated Please use non-legacy versions of these components */
 const LegacyForms = {
   SecretFormField,