Fusion-tools

Fix
- Some fixes for PropertyPlotter

Features
- Adding MultiFrameSlideMap and ChannelMixer components for visualization of multi-frame images
- Added functionality in PropertyPlotter for selected data

Fix
- Fixing GeoJSON coordinates shape from load_aperio

Features
- Adding more information to feature popups with sub-items for dictionary-type feature data
- Tested DSATileServer

Features
- Addition of OverlayOptions (overlay color, transparency, line color, and structure filtering), PropertyViewer (regional property visualization) tools
- Updated package structure
- Adding spatial aggregation for manual ROIs drawn on SlideMap components

Fix
- Adding CHANGELOG.md and other documentation

Fix
- Updating folder structure and adding documentation

- First release of `fusion-tools`, includes TileServer, LocalSlideViewer, FUSIONHandler, and Accessor for local and cloud-hosted data visualization and access