feat(core): implement spinlocks, GC and keyboard safety

* Implemented Spinlocks and applied to VM/Scheduler

* Added Garbage Collector for tasks

* Moved Getchar to IOKeyboard with locking

* Cleanup panic messages

kernel/inc/IO/IOConsole.h

@@ -29,7 +29,6 @@ IOGraphicsSize IOConsoleGetDimensions();
 void IOConsoleSetForegroundColor(IOGraphicsColor color);
 void IOConsoleSetDefaultForegroundColor(UInt32 color);
 void IOConsoleSetCursorPosition(IOGraphicsPoint* point);
-char IOConsoleGetCharacter();
 void IOConsoleReadLine(char* buffer, UInt32 limit);
 void IOConsolePutcharacter(char character);
 void IOConsolePrint(const char *string);

kernel/inc/IO/IOKeyboard.h

@@ -3,17 +3,20 @@
 
 #pragma once
 #include <types.h>
+#include <OS/OSSpinlock.h>
 
 enum {
     kIOKeyboardBufferSize = 256,
 };
 
 typedef struct { 
+    OSSpinlock lock;
     char buffer[kIOKeyboardBufferSize];
-    UInt16 head;
-    UInt16 tail;
-} IOKeyboardBuffer;
+    volatile UInt16 head;
+    volatile UInt16 tail;
+} IOKeyboardController;
 
-extern IOKeyboardBuffer gIOKeyboardInputBuffer;
+extern IOKeyboardController gIOKeyboardController;
 
 void IOKeyboardInterruptsHandler();
+char IOKeyboardGetCharacter();

kernel/inc/OS/OSScheduler.h

@@ -29,6 +29,7 @@ typedef struct OSTask {
     UInt32 sleepTicks;
     OSProcessState taskState; // reusing process_state cuz wn
     UInt64 kernelStackTop;
+    void* kernelStackBase;
     OSProcess* process;
     Int32 waitingForProcess;
 } OSTask;

kernel/inc/OS/OSSpinlock.h

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+
+#include <types.h>
+
+typedef struct OSSpinlock {
+    volatile UInt32 lockValue;
+} OSSpinlock;
+
+typedef struct OSSpinlockState {
+    Boolean interruptsEnabled;
+} OSSpinlockState;
+
+void OSSpinlockLock(OSSpinlock* lock);
+void OSSpinlockUnlock(OSSpinlock* lock);
+void OSSpinlockLockIRQ(OSSpinlock* lock, OSSpinlockState* state);
+void OSSpinlockUnlockIRQ(OSSpinlock *lock, OSSpinlockState* state);