- Add `Logger`, `Config` - Back to `nixos-unstable` - `nix flake update`
- Refactor `event` handling (heavily inspired by [crates-tui](https://github.com/ratatui/crates-tui/) via [Tui with Terminal and EventHandler](https://ratatui.rs/recipes/apps/terminal-and-event-handler/)) - Refactor widget structure - Disable `nixos-unstable` temporarily - Add `.rustfmt.toml`
(incl. cross-compiling)