Kernel+Userland: Add option for duration of /dev/beep producing sound

Author: https://github.com/supercomputer7
Commit: 26f96d2a42
Pull-request: https://github.com/SerenityOS/serenity/pull/20761
Reviewed-by: https://github.com/timschumi ✅

Userland/Libraries/LibCore/System.h

@@ -51,7 +51,7 @@
 namespace Core::System {
 
 #ifdef AK_OS_SERENITY
-ErrorOr<void> beep(u16 tone = 440);
+ErrorOr<void> beep(u16 tone = 440, u16 milliseconds_duration = 200);
 ErrorOr<void> pledge(StringView promises, StringView execpromises = {});
 ErrorOr<void> unveil(StringView path, StringView permissions);
 ErrorOr<void> unveil_after_exec(StringView path, StringView permissions);