feat(scheduler): working scheduler

Kernel/Include/OS/Scheduler.h

@@ -0,0 +1,42 @@
+#pragma once
+#include <Types.h>
+
+typedef enum OSTaskState {
+    OSTaskStateDead,
+    OSTaskStateRunning,
+    OSTaskStateReady,
+    OSTaskStateBlocked,
+    OSTaskStateSleeping,
+} OSTaskState;
+
+typedef struct OSProcess {
+    UInt64 id;
+    OSTaskState state;
+    Address* l0Table;
+    Address heapStart;
+    Address heapCurrent;
+    struct OSProcess* parent;
+    ASCII name[32];
+} OSProcess;
+
+typedef struct OSTask {
+    Address stackPointer;
+    struct OSTask* next;
+    UInt32 id;
+    UInt32 sleepTicks;
+    OSTaskState state;
+    Address kernelStackTop;
+    Pointer kernelStackBase;
+    OSProcess* process;
+    Int32 waitingForProcessId;
+} OSTask;
+
+enum {
+    kOSSchedulerTaskStackSize = 16 * 1024,
+    kOSSchedulerExceptionNumber = 0xF0F0
+};
+
+void SchedulerInitialize();
+OSTask* SchedulerSpawn(void(*entryPoint)(), OSProcess* owner, Boolean isUser, Address fixedUserStackAddress);
+Address SchedulerNext(Address stackPointer);
+void SchedulerYield(UInt64 ticks);