fixing host osal for GCC13

src/fsfw/osal/host/FixedTimeslotTask.h

@@ -5,6 +5,7 @@
 #include <condition_variable>
 #include <thread>
 #include <vector>
+#include <string>
 
 #include "fsfw/objectmanager/ObjectManagerIF.h"
 #include "fsfw/tasks/FixedSlotSequence.h"

src/fsfw/osal/host/PeriodicTask.h

@@ -5,6 +5,7 @@
 #include <condition_variable>
 #include <thread>
 #include <vector>
+#include <string>
 
 #include "fsfw/objectmanager/ObjectManagerIF.h"
 #include "fsfw/tasks/PeriodicTaskBase.h"

src/fsfw/osal/host/taskHelpers.h

@@ -4,6 +4,7 @@
 #include <fsfw/returnvalues/returnvalue.h>
 
 #include <thread>
+#include <string>
 
 namespace tasks {