工具模块，包含各种实用工具和服务
Classes
- BoxClip
- BoxDraggerUI
- BufferTool
- ClipBase
- CompassService
- ContourLine
- CoordinateTransform
- DistanceLegendService
- HeatMap
- MapLegendService
- MapSplit
- Measure
- ModelClip
- ModelCut
- ModelExcavation
- MultiViewPort
- PerformanceListening
- POISearchService
- SceneClip
- SightLimitCalculate
- Snap
- StatusBarService
- TerrainClip
- VolumeCalculation