fix includes of thread_pool_base.hpp

Author: ericniebler

include/exec/thread_pool_base.hpp

@@ -17,9 +17,29 @@
  */
 #pragma once
 
+
+#include "../stdexec/__detail/__execution_fwd.hpp"
+
+#include "../stdexec/__detail/__connect.hpp"
+#include "../stdexec/__detail/__env.hpp"
+#include "../stdexec/__detail/__meta.hpp"
+#include "../stdexec/__detail/__operation_states.hpp"
+#include "../stdexec/__detail/__receivers.hpp"
+#include "../stdexec/__detail/__schedulers.hpp"
+#include "../stdexec/__detail/__transform_completion_signatures.hpp"
+#include "../stdexec/__detail/__type_traits.hpp"
+
 #include "sender_for.hpp"
 #include "static_thread_pool.hpp"
 
+#include <atomic>
+#include <concepts>
+#include <cstdint>
+#include <exception>
+#include <tuple>
+#include <utility>
+#include <variant>
+
 namespace experimental::execution
 {
   struct CANNOT_DISPATCH_BULK_ALGORITHM_TO_THE_POOL_SCHEDULER;