FEAT: use egui_tiles for new ui

Cargo.lock

Cargo.toml

assets/icons/lan-connect.svg

assets/icons/lan-disconnect.svg

assets/icons/lan-pending.svg

build.rs

docs/gui.md

src/gui.rs

src/gui/context_menu.rs

src/gui/mod.rs

src/gui/widgets/about.rs

src/gui/widgets/debug.rs

src/gui/widgets/log.rs

src/gui/widgets/map_view.rs

src/gui/widgets/message_list.rs

src/gui/widgets/mod.rs

src/gui/widgets/node_list.rs

src/gui/widgets/settings.rs

src/gui/widgets/signal_strength_history.rs

src/main.rs