core: Event loop rework (#5466)

* Event loop rework

* revert missed

src/managers/eventLoop/EventLoopTimer.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <chrono>
+#include <functional>
+#include <optional>
+
+class CEventLoopTimer {
+  public:
+    CEventLoopTimer(std::optional<std::chrono::system_clock::duration> timeout, std::function<void(std::shared_ptr<CEventLoopTimer> self, void* data)> cb_, void* data_);
+
+    // if not specified, disarms.
+    // if specified, arms.
+    void  updateTimeout(std::optional<std::chrono::system_clock::duration> timeout);
+
+    void  cancel();
+    bool  passed();
+
+    float leftUs();
+
+    bool  cancelled();
+    // resets expires
+    void call(std::shared_ptr<CEventLoopTimer> self);
+
+  private:
+    std::function<void(std::shared_ptr<CEventLoopTimer> self, void* data)> cb;
+    void*                                                                  data = nullptr;
+    std::optional<std::chrono::system_clock::time_point>                   expires;
+    bool                                                                   wasCancelled = false;
+};