Add some headers as suggested by Copilot

Author: YexuanXiao

cppwinrt/cmd_reader.h

@@ -5,6 +5,7 @@
 #include <limits>
 #include <climits>
 #include <cstdint>
+#include <cctype>
 #include <string>
 #include <string_view>
 #include <map>

cppwinrt/text_writer.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cassert>
+#include <cstdio>
 #include <filesystem>
 #include <fstream>
 #include <sstream>

strings/base_error.h

@@ -45,7 +45,7 @@ namespace winrt::impl
     {
         wchar_t const* back = message + size - 1;
 
-        while (size&& std::iswspace(*back))
+        while (size && std::iswspace(*back))
         {
             --size;
             --back;

strings/base_fast_forward.h

@@ -1,5 +1,7 @@
 #include <cstddef>
 #include <atomic>
+#include <cstdint>
+#include <cstring>
 
 #define WINRT_IMPL_STRING_1(expression) #expression
 #define WINRT_IMPL_STRING(expression) WINRT_IMPL_STRING_1(expression)

strings/base_includes.h

@@ -6,6 +6,8 @@
 #include <charconv>
 #include <chrono>
 #include <cstddef>
+#include <cstdint>
+#include <cstdlib>
 #include <cstring>
 #include <cwchar>
 #include <cwctype>