Configure UnityYAMLMerge for Unity text files

- Обновлен .gitattributes: отключено LFS-отслеживание для сцен, префабов, ассетов, контроллеров анимации и т.д., чтобы они оставались текстовыми файлами в Git.
- Включен драйвер слияния unityyamlmerge для всех YAML-файлов Unity.

.gitattributes

@@ -1,4 +1,4 @@
-# Unity LFS tracking
+# Unity LFS tracking for binary assets
 *.png filter=lfs diff=lfs merge=lfs -text
 *.psd filter=lfs diff=lfs merge=lfs -text
 *.psb filter=lfs diff=lfs merge=lfs -text
@@ -34,8 +34,12 @@
 *.mp4 filter=lfs diff=lfs merge=lfs -text
 *.mov filter=lfs diff=lfs merge=lfs -text
 
-# Unity lockable files (LFS with lockable attribute)
-*.unity filter=lfs diff=lfs merge=lfs -text lockable
-*.prefab filter=lfs diff=lfs merge=lfs -text lockable
-*.asset filter=lfs diff=lfs merge=lfs -text lockable
-*.controller filter=lfs diff=lfs merge=lfs -text lockable
+# Unity Text Files - Smart Merge
+*.unity merge=unityyamlmerge text
+*.prefab merge=unityyamlmerge text
+*.asset merge=unityyamlmerge text
+*.controller merge=unityyamlmerge text
+*.physicMaterial merge=unityyamlmerge text
+*.physicsMaterial2D merge=unityyamlmerge text
+*.mat merge=unityyamlmerge text
+*.anim merge=unityyamlmerge text