Logria

- Fix crash when fed invalid regex

- Support `Page Up` and `Page Down` when scrolling
- Fix bug where the app would not quit if attempted from the startup screen
- Fix bug rendering null characters

- Fix bug where config mode was invoked incorrectly
- Support more graceful app exit, clean up subprocesses

- Hotfix: fix crash on fresh installation

- Significant app refactor, simplifying main app loop
- Reduce memory consumption when checking previous render content
- Add tests for render positions and scrolling

- Fix bug where we incorrectly determined the poll rate
- Fix bug where we constantly reset the poll rate to the minimum when scrolling