Fixes Intervisibility issue with AW3D30 as per #122

What's Changed

• Bump System.Text.RegularExpressions from 4.3.0 to 4.3.1 in /DEM.Net.TestWinForm by @dependabot in #94
• Bump Newtonsoft.Json from 12.0.3 to 13.0.1 in /DEM.Net.Core by @dependabot in #101
• Bump Newtonsoft.Json from 12.0.3 to 13.0.1 in /MigrationBackup/a9e1cbe7/DEM.Net.TestWinForm by @dependabot in #102
• moved package to central package management by @xfischer in #115
• update urls (imagery, opentopo) #114 by @xfischer in #116
• removed appveyor and azure pipelines by @xfischer in #118
• Set DEM.Net project to pure .Net 8 by @RotateAt60MPH in #117
• .Net 8 support cleanup by @RotateAt60MPH in #120
• release 8.0.0 by @xfischer in #121
• GH actions for build and nuget release by @xfischer in #119

New Contributors

• @RotateAt60MPH made their first contribution in #117

Full Changelog: 0.3.2...8.0.0

• SourceLink support
• Code refactor (removed useless interfaces, readability)
• Lines bulk elevation (better performance)
• Imagery disk cache
• Procedural mesh generation for axis, cylinder, cones

• models are now centered on origin
• glTF each mesh in its own node
• imagery: support for 512px tiles
• line elevation bug fix (last point was missing)
• visual topo support (early)

• NASADEM dataset support
• GeoTiff heightmap fixes

• Intervisibility
• IImageryService interface removed

• VisibilityReport: edge case fixed when target point is still inside obstacle
• VisibilityReport: support for start elevation offset and lower level signatures

• netCDF support (needs native dependencies, see SDSLite for setup information)
• GEBCO 2019 dataset integration
• Intervisibility report (Is point A visible from point B), aka Raycasting

• glTF code is now using gltfSharp
• NASA Aster GDEM v3 support
• Various concurrency fixes
• GeoTIFF imprecisions fixed
• Imagery memory cache
• Attributions exported with models

Tokens check in imagery service