added a layoutmanager and basic dwindle

src/managers/LayoutManager.cpp

@@ -0,0 +1,11 @@
+#include "LayoutManager.hpp"
+
+IHyprLayout* CLayoutManager::getCurrentLayout() {
+    switch (m_iCurrentLayoutID) {
+        case DWINDLE: 
+            return &m_cDwindleLayout;
+    }
+
+    // fallback
+    return &m_cDwindleLayout;
+}