feat: further kernel power and power optimizations

kernel/src/Drivers/Input/InputEvents.hpp

@@ -0,0 +1,22 @@
+/*
+    * InputEvents.hpp
+    * Shared input activity event source
+    * Copyright (c) 2026 Daniel Hammer
+*/
+
+#pragma once
+#include <cstdint>
+
+namespace Drivers::InputEvents {
+
+    // Monotonic serial incremented after mouse or keyboard state changes.
+    uint64_t GetSerial();
+
+    // Notify latency-sensitive input activity and wake input waiters.
+    void NotifyActivity();
+
+    // Wait until the serial differs from observedSerial or timeoutMs elapses.
+    // timeoutMs == 0 is a poll; timeoutMs == UINT64_MAX waits indefinitely.
+    uint64_t WaitForChange(uint64_t observedSerial, uint64_t timeoutMs);
+
+}