NodeGraph: Exploration mode (#33623)

* Add exploration option to node layout

* Add hidden node count

* Add grid layout option

* Fix panning bounds calculation

* Add legend with sorting

* Allow sorting on any stats or arc value

* Fix merge

* Make sorting better

* Reset focused node on layout change

* Refactor limit hook a bit

* Disable selected layout button

* Don't show markers if only 1 node is hidden

* Move legend to the bottom

* Fix text backgrounds

* Add show in graph layout action in grid layout

* Center view on the focused node, fix perf issue when expanding big graph

* Limit the node counting

* Comment and linting fixes

* Bit of code cleanup and comments

* Add state for computing layout

* Prevent computing map with partial data

* Add rollup plugin for worker

* Add rollup plugin for worker

* Enhance data from worker

* Fix perf issues with reduce and object creation

* Improve comment

* Fix tests

* Css fixes

* Remove worker plugin

* Add comments

* Fix test

* Add test for exploration

* Add test switching to grid layout

* Apply suggestions from code review

Co-authored-by: Zoltán Bedi <zoltan.bedi@gmail.com>

* Remove unused plugin

* Fix function name

* Remove unused rollup plugin

* Review fixes

* Fix context menu shown on layout change

* Make buttons bigger

* Moved NodeGraph to core grafana

Co-authored-by: Zoltán Bedi <zoltan.bedi@gmail.com>

public/app/plugins/datasource/testdata/nodeGraphUtils.ts

@@ -1,6 +1,5 @@
-import { ArrayVector, FieldType, MutableDataFrame } from '@grafana/data';
+import { ArrayVector, FieldType, MutableDataFrame, NodeGraphDataFrameFieldNames } from '@grafana/data';
 import { nodes, edges } from './testData/serviceMapResponse';
-import { NodeGraphDataFrameFieldNames } from '@grafana/ui';
 
 export function generateRandomNodes(count = 10) {
   const nodes = [];