[ckernel] split by game version (#1559)

* temp

* split up kprint, other than format

* start kmachine

* split kmachine

* split kscheme

* split klink

* split klisten

* split remaining

* jak2 ckernel gets to nokernel loop

game/kernel/jak2/kmalloc.cpp

@@ -0,0 +1,24 @@
+#include "kmalloc.h"
+
+/*
+ * Jak 2 adds a few "memopen" functions. I think these were used to categorize memory allocations.
+ * GOAL and C++ code will call "memopen" with an appropriate category name before making
+ * allocations.
+ *
+ * These functions do nothing in the release version (and all known versions), but they might be
+ * interested for us to track memory usage.
+ */
+
+namespace jak2 {
+void kmemopen_from_c(Ptr<kheapinfo> heap, const char* name) {
+  (void)heap;
+  (void)name;
+}
+
+void kmemopen(u32 heap, u32 name) {
+  (void)heap;
+  (void)name;
+}
+
+void kmemclose() {}
+}  // namespace jak2