adds a queue library, work for keyb driver

libc/include/queue.h

@@ -0,0 +1,25 @@
+#include <stdint.h>
+
+#ifndef QUEUE_H
+#define QUEUE_H
+
+#define MAX_QUEUE_SIZE 100
+
+typedef struct {
+	uint8_t items[MAX_QUEUE_SIZE];
+	short front;
+	short rear;
+} queue;
+
+void init_queue(queue* q);
+
+bool queue_is_empty(queue* q);
+bool queue_is_full(queue* q);
+
+void enqueue(queue* q, uint8_t val);
+void dequeue(queue* q);
+
+uint8_t queue_peek(queue* q);
+
+
+#endif