addind more important kernel files and also fixing bugs

kernel/scheduler.h

@@ -1,6 +1,21 @@
 #ifndef SCHEDULER_H
 #define SCHEDULER_H
 
+#include <stdint.h>
+
+#define MAX_TASKS 8
+#define STACK_SIZE 1024
+
+typedef struct task {
+    uint32_t id;
+    void (*entry)(void);
+    uint32_t *stack_ptr;
+    struct task *next;
+} task_t;
+
 void scheduler_init();
+void scheduler_add_task(void (*entry)(void));
+void scheduler_schedule();
+void scheduler_yield();  // Optional for cooperative scheduling
 
 #endif // SCHEDULER_H