feat: fruits, globals, input, snake, point, window

src/fruit.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+#include <cstdlib>
+#include <ctime>
+#include "util.h"
+#include "fruit.hpp"
+
+Fruit::Fruit() {
+    std::srand(std::time(0));
+}
+
+void Fruit::create_point() {
+    m_point = Point {rand() % 9, rand() % 9};
+}