Configure Git LFS for large files

Add Git LFS tracking for files over 10MB:
- saved_models/u2net/u2net.pth (169MB)
- saved_models/u2net_portrait/u2net_portrait.pth (169MB)
- fg_mask_mvtec_loco.zip (27MB)
- figures/view-move.gif (11MB)

This enables efficient storage and upload to Hugging Face Hub.
🤖 Generated with [Claude Code]

Co-Authored-By: Claude <[email protected]>

.gitattributes

@@ -33,6 +33,10 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.zip filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
+saved_models/u2net/u2net.pth filter=lfs diff=lfs merge=lfs -text
+saved_models/u2net_portrait/u2net_portrait.pth filter=lfs diff=lfs merge=lfs -text
+fg_mask_mvtec_loco.zip filter=lfs diff=lfs merge=lfs -text
+figures/view-move.gif filter=lfs diff=lfs merge=lfs -text
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.png filter=lfs diff=lfs merge=lfs -text