text: Title: Contribution: tree visualisation for lightgbm models
  Body: Recently `dtreeviz` has added support for lightgbm models: https://github.com/parrt/dtreeviz/
  
  So it would be cool to add the same tree visualization in explainerdashboard that already exist for RandomForest, ExtraTrees and XGBoost models.
  
  If someone wants to pitch in to help extract individual predictions of decision trees inside lightgbm boosters and then get them in shape to be used by the dashboard that would be great!