Plugin System (#1590)

---------

Co-authored-by: Mihai Fufezan <fufexan@protonmail.com>

example/examplePlugin/customDecoration.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#define WLR_USE_UNSTABLE
+
+#include "../../src/render/decorations/IHyprWindowDecoration.hpp"
+
+class CCustomDecoration : public IHyprWindowDecoration {
+  public:
+    CCustomDecoration(CWindow*);
+    virtual ~CCustomDecoration();
+
+    virtual SWindowDecorationExtents getWindowDecorationExtents();
+
+    virtual void                     draw(CMonitor*, float a, const Vector2D& offset);
+
+    virtual eDecorationType          getDecorationType();
+
+    virtual void                     updateWindow(CWindow*);
+
+    virtual void                     damageEntire();
+
+  private:
+    SWindowDecorationExtents m_seExtents;
+
+    CWindow*                 m_pWindow = nullptr;
+
+    Vector2D                 m_vLastWindowPos;
+    Vector2D                 m_vLastWindowSize;
+};