layout: add direction parameter to onWindowCreated and friends (#3269)

* feat(layout): add direction parameter to onWindowCreated and friends

In addition:

- Implement directional moveWindowOutOfGroup for `movewindoworgroup`
  when using dwindle layout. (augmentation of #3006)
- Replace `DWindleLayout::OneTimeFocus` with `IHyprLayout::eDirection`.
- Slight formatting change (clang-format).

* fix: nullptr dereference in dwindle window creation

* refactor: generalized eDirection

* refactor: eliminate DIRECTION_NONE

* Update IHyprLayout.hpp

src/layout/IHyprLayout.hpp

@@ -15,8 +15,7 @@ struct SLayoutMessageHeader {
 
 enum eFullscreenMode : uint8_t;
 
-enum eRectCorner
-{
+enum eRectCorner {
     CORNER_NONE = 0,
     CORNER_TOPLEFT,
     CORNER_TOPRIGHT,
@@ -24,6 +23,14 @@ enum eRectCorner
     CORNER_BOTTOMLEFT
 };
 
+enum eDirection {
+    DIRECTION_DEFAULT = -1,
+    DIRECTION_UP = 0,
+    DIRECTION_RIGHT,
+    DIRECTION_DOWN,
+    DIRECTION_LEFT
+};
+
 class IHyprLayout {
   public:
     virtual ~IHyprLayout()   = 0;
@@ -35,8 +42,8 @@ class IHyprLayout {
         The layout HAS TO set the goal pos and size (anim mgr will use it)
         If !animationinprogress, then the anim mgr will not apply an anim.
     */
-    virtual void onWindowCreated(CWindow*);
-    virtual void onWindowCreatedTiling(CWindow*) = 0;
+    virtual void onWindowCreated(CWindow*, eDirection direction = DIRECTION_DEFAULT);
+    virtual void onWindowCreatedTiling(CWindow*, eDirection direction = DIRECTION_DEFAULT) = 0;
     virtual void onWindowCreatedFloating(CWindow*);
 
     /*