Reconstruct readable C++ and organize cohesive source subsystems

Administrative source import: native x86 compilation passed for 423 authored units. Source placement and submission states are migrated separately; this commit does not imply peer acceptance.

Previous head: 35d2a8cb36
Payload SHA256: 592f016d2730c5593bb653aa054c1e5f76a6df72c8f5a09e66f74876e2e33dee

Source/Resource/ResourceTransient.cpp

@@ -4,6 +4,7 @@
 // FUNCTION: fn_18186
 void ResourceMgr::UpdateTransient() {
   const auto end = this->m_transient.end();
+
   for (auto it = this->m_transient.begin(); it != end; ++it) {
     (*it)->Slot02();
   }