LibCore: Move Stream-based file into the Core namespace

Author: https://github.com/timschumi
Commit: 606a3982f3
Pull-request: https://github.com/SerenityOS/serenity/pull/17406
Reviewed-by: https://github.com/linusg

Userland/Utilities/lsirq.cpp

@@ -7,6 +7,7 @@
 
 #include <AK/JsonArray.h>
 #include <AK/JsonObject.h>
+#include <LibCore/File.h>
 #include <LibCore/Stream.h>
 #include <LibCore/System.h>
 #include <LibMain/Main.h>
@@ -17,7 +18,7 @@ ErrorOr<int> serenity_main(Main::Arguments)
     TRY(Core::System::unveil("/sys/kernel/interrupts", "r"));
     TRY(Core::System::unveil(nullptr, nullptr));
 
-    auto proc_interrupts = TRY(Core::Stream::File::open("/sys/kernel/interrupts"sv, Core::Stream::OpenMode::Read));
+    auto proc_interrupts = TRY(Core::File::open("/sys/kernel/interrupts"sv, Core::File::OpenMode::Read));
 
     TRY(Core::System::pledge("stdio"));