Windowed GUI: wm module, input routing, and the paint app

- Add the wm window-manager facility per ADR 0004: overlapping
  pixel-surface windows, damage-rectangle compositing, WM-drawn title
  bar, focus/minimize/close, and F1-F4 keybindings
- Add gop shadow compositing primitives and vt::repaint_region so the
  console stays layer 0 beneath windows
- Route mouse (absolute coords, press/release edges) and keyboard
  (focus-aware input pump) to the focused window
- Add the rspaint drawing-program crate (pen, 8 colors, clear) and shell
  draw/windows/restore commands
- Extend TaskMsg with AppMouse/Focus/Close and document the design in
  CONTEXT.md + ADR 0004

1 files changed, 5 insertions, 4 deletions

diff --git a/rsnix/src/lib.rs b/rsnix/src/lib.rs
index f5c3419..a422057 100644
--- a/rsnix/src/lib.rs
+++ b/rsnix/src/lib.rs
@@ -4,6 +4,7 @@ extern crate alloc;
 
 pub mod ahci;
 pub mod cursor;
+pub mod ehci;
 pub mod fat;
 pub mod font;
 pub mod fs;
@@ -14,16 +15,16 @@ pub mod klog;
 pub mod memory;
 pub mod paging;
 pub mod pci;
-pub mod qr;
 pub mod power;
 pub mod ps2;
-pub mod uhci;
-pub mod ehci;
-pub mod usb;
+pub mod qr;
 pub mod rtc;
 pub mod sched;
 pub mod serial;
 pub mod strbuf;
 pub mod tty;
 pub mod uefi;
+pub mod uhci;
+pub mod usb;
 pub mod vt;
+pub mod wm;