feat: devices via caps (BootInfo, init assigns devices, drivers map MMIO/DMA themselves, IRQ-driven input); drop boot device wiring and info pages; headless display fallback

crates/ports/input-device/src/lib.rs

@@ -51,4 +51,7 @@ pub enum InputEvent {
 pub trait InputDevice {
     fn poll(&mut self) -> Option<InputEvent>;
     fn has_event(&self) -> bool;
+    /// Clears the device's own interrupt condition after an IRQ, before
+    /// the line is re-armed. Devices that clear it by being read need not.
+    fn acknowledge(&mut self) {}
 }