rux-shell 0.5.1

Rux runtime shell: window, GPU surface, input, and frame loop. Internal to Rux; the supported entry point is the ruxlang crate.
Documentation

Rux runtime shell, milestone M3.

Opens a native window (winit), manages the GPU via vello's RenderContext, loads a .rux document each frame's tree from rux-runtime, and paints it (rux-paint). A notify file watcher wakes the event loop through an EventLoopProxy on every save, so edits to the .rux file repaint live, the hot-reload path from docs/04-architecture.md.