[+] Readd IPCPipe nt nonblock read (copy of process)

Source/IPC/IPCPipe.NT.cpp

@@ -202,6 +202,22 @@ namespace Aurora::IPC
             return false;
         }
 
+        if (nonblocking || !write.ptr)
+        {
+            DWORD avail {};
+            if (!PeekNamedPipe(h, NULL, NULL, NULL, &avail, NULL))
+            {
+                return false;
+            }
+
+            if (!avail)
+            {
+                return true;
+            }
+
+            size = AuMin(size, avail);
+        }
+
         if (!write.ptr)
         {
             write.outVariable = size;