feat: added lst structure

srcs/lst/ft_lstpush.c

@@ -0,0 +1,22 @@
+#include "libft.h"
+
+void ft_lstpush(t_list **lst, t_list *node)
+{
+    t_list *current;
+
+    if (!lst || !node)
+        return;
+
+    node->next = NULL;
+    
+    if (*lst == NULL)
+    {
+        *lst = node;
+        return;
+    }
+
+    current = *lst;
+    while (current->next != NULL)
+        current = current->next;
+    current->next = node;
+}