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/input/InputManager.hpp

@@ -144,7 +144,7 @@ class CInputManager {
     std::deque<PHLLSREF> m_dExclusiveLSes;
 
     // constraints
-    std::vector<std::weak_ptr<CPointerConstraint>> m_vConstraints;
+    std::vector<WP<CPointerConstraint>> m_vConstraints;
 
     //
     void              newTabletTool(wlr_input_device*);
@@ -241,9 +241,9 @@ class CInputManager {
 
     // idle inhibitors
     struct SIdleInhibitor {
-        std::shared_ptr<CIdleInhibitor> inhibitor;
-        bool                            nonDesktop = false;
-        CHyprSignalListener             surfaceDestroyListener;
+        SP<CIdleInhibitor>  inhibitor;
+        bool                nonDesktop = false;
+        CHyprSignalListener surfaceDestroyListener;
     };
     std::vector<std::unique_ptr<SIdleInhibitor>> m_vIdleInhibitors;