added task kill

Author: yuvraj1803

kernel/task/task.c

@@ -111,6 +111,11 @@ void gammaos_first_ever_task(){
 
 /**==========================================================================*/
 
+void task_kill(struct task* _task){
+    destroy_virtual_address_space(_task->task_space);
+    task_list_delete(_task);
+    kfree(_task);
+}
 void current_task_save_state(struct interrupt_frame* iframe){
 
     if(!cur_task){

kernel/task/task.h

@@ -50,6 +50,7 @@ struct task*    new_task(struct process* _process);
 struct task*    next_task();
 int8_t          close_task(struct task* _task);
 
+void task_kill(struct task* _task);
 void task_switch(struct task* _task);
 void enter_task(struct reg* registers);
 void restore_gprs(struct reg* registers);