internal: new shared_ptr and weak_ptr implementation (#5883)

moves std::shared_ptrs to a new implementation

Advantages:
- you can dereference a weak_ptr directly. This will obviously segfault on a nullptr deref if it's expired.
   - this is useful to avoid the .lock() hell where we are 100% sure the pointer _should_ be valid. (and if it isn't, it should throw.)
- weak_ptrs are still valid while the SP is being destroyed.
   - reasoning: while an object (e.g. CWindow) is being destroyed, its `weak_ptr self` should be accessible (the sp is still alive, and so is CWindow), but it's not because by stl it's already expired (to prevent resurrection)
   - this impl solves it differently. w_p is expired, but can still be dereferenced and used. Creating `s_p`s is not possible anymore, though.
   - this is useful in destructors and callbacks.

src/managers/AnimationManager.cpp

@@ -7,7 +7,7 @@
 #include "../desktop/LayerSurface.hpp"
 #include "eventLoop/EventLoopManager.hpp"
 
-int wlTick(std::shared_ptr<CEventLoopTimer> self, void* data) {
+int wlTick(SP<CEventLoopTimer> self, void* data) {
     if (g_pAnimationManager)
         g_pAnimationManager->onTicked();
 
@@ -27,7 +27,7 @@ CAnimationManager::CAnimationManager() {
     std::vector<Vector2D> points = {Vector2D(0, 0.75f), Vector2D(0.15f, 1.f)};
     m_mBezierCurves["default"].setup(&points);
 
-    m_pAnimationTimer = std::make_unique<CEventLoopTimer>(std::chrono::microseconds(500), wlTick, nullptr);
+    m_pAnimationTimer = SP<CEventLoopTimer>(new CEventLoopTimer(std::chrono::microseconds(500), wlTick, nullptr));
     g_pEventLoopManager->addTimer(m_pAnimationTimer);
 }