Reactive Callbacks and integrate them

src/Library/internal-include/System/callbacks_internal.hpp

@@ -2,7 +2,7 @@
 #include <PSX/System/threads.hpp>
 
 namespace JabyEngine {
-    namespace [[deprecated("Callbacks are deprecated for now")]] Callback {
+    namespace Callback {
         namespace internal {
             namespace VSync {
                 static constexpr size_t StackSize = 64;
@@ -16,6 +16,19 @@ namespace JabyEngine {
                     Thread::execute_next();
                 }
             }
+
+            namespace DataReady {
+                static constexpr size_t StackSize = 256;
+
+                extern SysCall::ThreadHandle thread_handle;
+                extern uint32_t              stack[StackSize];
+                void                         routine();
+
+                static void execute() {
+                    MainThread::prepare_if_main(DataReady::thread_handle);
+                    Thread::execute_next();
+                }
+            }
         }
     }
 }