add missing includes for a hermetic build

Hermetic builds look for all necessary includes for the features used
in the header files. This commit adds the missing includes.

include/slang/diagnostics/DiagArgFormatter.h

@@ -8,6 +8,9 @@
 #pragma once
 
 #include <any>
+#include <string>
+
+#include "slang/slang_export.h"
 
 namespace slang {
 

include/slang/util/BumpAllocator.h

@@ -10,6 +10,7 @@
 #include <cstring>
 #include <new>
 #include <span>
+#include <type_traits>
 
 #include "slang/util/Util.h"
 

include/slang/util/CopyPtr.h

@@ -7,6 +7,10 @@
 //------------------------------------------------------------------------------
 #pragma once
 
+#include <cstddef>
+#include <ostream>
+#include <utility>
+
 namespace slang {
 
 /// A smart pointer that allocates its pointee on the heap and provides value copy

include/slang/util/Function.h

@@ -7,7 +7,9 @@
 //------------------------------------------------------------------------------
 #pragma once
 
+#include <cstddef>
 #include <cstdint>
+#include <type_traits>
 
 namespace slang {
 

include/slang/util/Random.h

@@ -7,6 +7,7 @@
 //------------------------------------------------------------------------------
 #pragma once
 
+#include <algorithm>
 #include <array>
 #include <functional>
 #include <random>

include/slang/util/SmallVector.h

@@ -8,6 +8,7 @@
 #pragma once
 
 #include <algorithm>
+#include <iterator>
 #include <limits>
 #include <memory>
 #include <span>

tools/netlist/include/DirectedGraph.h

@@ -79,7 +79,7 @@ class Node {
         return *this;
     }
     Node<NodeType, EdgeType>& operator=(Node<NodeType, EdgeType>&& node) noexcept {
-        edges = std::move(node.Edges);
+        edges = std::move(node.edges);
         return *this;
     }