Add Ultralytics ViT Docs (#3230)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

docs/reference/vit/utils/loss.md

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+---
+description: DETRLoss is a method for optimizing detection of objects in images. Learn how to use it in RTDETRDetectionLoss at Ultralytics Docs.
+keywords: DETRLoss, RTDETRDetectionLoss, Ultralytics, object detection, image classification, computer vision
+---
+
+## DETRLoss
+---
+### ::: ultralytics.vit.utils.loss.DETRLoss
+<br><br>
+
+## RTDETRDetectionLoss
+---
+### ::: ultralytics.vit.utils.loss.RTDETRDetectionLoss
+<br><br>

docs/reference/vit/utils/ops.md

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+---
+description: Learn about HungarianMatcher and inverse_sigmoid functions in the Ultralytics YOLO Docs. Improve your object detection skills today!.
+keywords: Ultralytics, YOLO, object detection, HungarianMatcher, inverse_sigmoid
+---
+
+## HungarianMatcher
+---
+### ::: ultralytics.vit.utils.ops.HungarianMatcher
+<br><br>
+
+## get_cdn_group
+---
+### ::: ultralytics.vit.utils.ops.get_cdn_group
+<br><br>
+
+## inverse_sigmoid
+---
+### ::: ultralytics.vit.utils.ops.inverse_sigmoid
+<br><br>