[Client] Show horizontal art for plane and siege cards in the profile banner (#7118) (#7250)

Use the landscape orientation flag to rotate sideways-layout card art
upright before cropping, so planes/sieges show their horizontal art as
the server profile banner card instead of a rotated full card.

- Curve cropCardArt around the card's landscapeOrientation flag with
  landscape-specific art margins (mirrors CardInfoPictureWidget)
- Add shared CardArtUtils::rotateSidewaysLayoutArt helper and apply it
  to the playmat (game render and settings preview) and card info widget,
  replacing three duplicate 90-degree rotation blocks

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

cockatrice/src/interface/widgets/playmat/playmat_settings_dialog.cpp

@@ -2,6 +2,7 @@
 
 #include "../../card_picture_loader/card_picture_loader.h"
 #include "../cards/art_crop_attribution.h"
+#include "../cards/card_art_utils.h"
 #include "../utility/completer_utils.h"
 #include "card_database_display_model.h"
 #include "card_database_model.h"
@@ -276,7 +277,7 @@ void PlaymatSettingsDialog::reloadPreview()
         return;
     }
 
-    currentPixmap = fullRes;
+    currentPixmap = CardArtUtils::rotateSidewaysLayoutArt(fullRes, card);
     preview->setPixmap(currentPixmap);
     preview->setParams(currentParams);
     preview->setAttribution(buildArtAttribution(card));