Support loading dynamic addon modules (`.node` files) when embedding the Node.js shared library without needing to link with `node.def` about node

[segevfiner]

So basically something like the following (Untested though):
In node:

diff --git a/src/node_binding.cc b/src/node_binding.cc
index 00493f03f1..6f56f79dc5 100644
--- a/src/node_binding.cc
+++ b/src/node_binding.cc
@@ -457,6 +457,27 @@ void DLOpen(const FunctionCallbackInfo<Value>& args) {
     return;  // Exception pending.
   }
 
+#if defined(_WIN32) && defined(NODE_SHARED_MODE)
+  HMODULE mod;
+  if (!GetModuleHandleExA(
+      GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+      &DLOpen,
+      &mod
+    )) {
+      THROW_ERR_DLOPEN_FAILED(env, "TODO.");
+      return false;
+  }
+
+  // TODO Might want a dynamic allocation, with the possibility to opt into long path support in the future
+  char nodeLibrary[MAX_PATH];
+  if (!GetModuleFileNameA(mod, &nodeLibrary, sizeof(nodeLibrary))) {
+    THROW_ERR_DLOPEN_FAILED(env, "TODO.");
+    return false;
+  }
+
+  std::setenv("NODE_LIBRARY", nodeLibrary);
+#endif  // _WIN32
+
   node::Utf8Value filename(env->isolate(), args[1]);  // Cast
   env->TryLoadAddon(*filename, flags, [&](DLib* dlib) {
     static Mutex dlib_load_mutex;

In node-gyp:

diff --git a/src/win_delay_load_hook.cc b/src/win_delay_load_hook.cc
index 169f802..0c136ed 100644
--- a/src/win_delay_load_hook.cc
+++ b/src/win_delay_load_hook.cc
@@ -28,7 +28,7 @@ static FARPROC WINAPI load_exe_hook(unsigned int event, DelayLoadInfo* info) {
   if (_stricmp(info->szDll, HOST_BINARY) != 0)
     return NULL;
 
-  m = GetModuleHandle(NULL);
+  m = GetModuleHandle(std::getenv("NODE_LIBRARY"));
   return (FARPROC) m;
 }