feat: start adding physical memory allocator

kernel/include/util/utility.h

@@ -0,0 +1,28 @@
+#pragma once
+
+// Minimal freestanding replacements for <utility> (no stdlib available).
+
+template<typename T>
+struct remove_reference { using type = T; };
+template<typename T>
+struct remove_reference<T&> { using type = T; };
+template<typename T>
+struct remove_reference<T&&> { using type = T; };
+
+template<typename T>
+using remove_reference_t = typename remove_reference<T>::type;
+
+template<typename T>
+constexpr remove_reference_t<T>&& move(T&& value) {
+    return static_cast<remove_reference_t<T>&&>(value);
+}
+
+template<typename T>
+constexpr T&& forward(remove_reference_t<T>& value) {
+    return static_cast<T&&>(value);
+}
+
+template<typename T>
+constexpr T&& forward(remove_reference_t<T>&& value) {
+    return static_cast<T&&>(value);
+}