Gnss-visualizer

Added
- Plot selection mechanism
- More tests
- Rewind playback mechanism
- Configurable playback speed control

Changed
- Improved module architecture

Changed
- Try to fix Github action publishing

Changed
- Github release test

Changed
- Readme fixes for PyPI

Added
- Testing setup
- Readme

Added
- Translations

Changed
- Language to English
- Skip simulated waiting for serial devices