Move dev-only JSON reading infrastructure from DataSync to DataSync.Dev:
- JsonColumnSchema (Models/)
- JsonZstdFileSource (Sources/)
- JsonStreamingDataReader (Sources/)
- Utf8JsonStreamingDataReader (Sources/)
Update namespaces and using statements in all DevEtl files.
- Create JdeScoping.DataSync.Dev for sandbox testing ETL code
- Create JdeScoping.DataSync.Dev.Tests for associated tests
- Move 22 source files and 8 test files
- Update namespaces from DevEtl to Dev
- Add both projects to solution