fix(kcp, IDT, Heap, kernel): Various fixes, scrap broken memory allocator

kernel/src/Platform/ABI.cpp

@@ -0,0 +1,17 @@
+/*
+    * Itanium.cpp
+    * Definitions for the Itanium C++ ABI
+    * Copyright (c) Daniel Hammer, Limine Contributors (via Limine C++ example)
+*/
+
+#include <Platform/Util.hpp>
+
+// The following stubs are required by the Itanium C++ ABI (the one we use,
+// regardless of the "Itanium" nomenclature).
+// Like the memory functions above, these stubs can be moved to a different .cpp file,
+// but should not be removed, unless you know what you are doing.
+extern "C" {
+    int __cxa_atexit(void (*)(void *), void *, void *) { return 0; }
+    void __cxa_pure_virtual() { hcf(); }
+    void *__dso_handle;
+}