Refactor data access

refactored data access: the core logic for reading telemetry data has been moved and restructured to support different data sources. the sdk now uses modular providers, and currently supports two: Live, for connecting to a running instance of iracing, and an IBT provider for reading IBT telemetry files.

What's Changed

• Refactor data access by @SVappsLAB in #20

Full Changelog: v0.9.1...v0.9.2