Add support for synchronizing navigation across split panes.

[copybara-service]

Add support for synchronizing navigation across split panes.

• Allow users to sync navigation by node id, or upload a data json file to specify
  node id mapping. When user selects one node in one side of the pane, the node
  with mapped id will be automatically selected in another pane.
• Allow visualizer component user to pass mapping data through visualizer config.

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