ultralytics 8.0.79 expand Docs reference section (#2053)

Co-authored-by: Ayush Chaurasia <ayush.chaurarsia@gmail.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Fri3dChicken <87434761+AmoghDhaliwal@users.noreply.github.com>

docs/reference/yolo/utils/metrics.md

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+# FocalLoss
+---
+:::ultralytics.yolo.utils.metrics.FocalLoss
+<br><br>
+
+# ConfusionMatrix
+---
+:::ultralytics.yolo.utils.metrics.ConfusionMatrix
+<br><br>
+
+# Metric
+---
+:::ultralytics.yolo.utils.metrics.Metric
+<br><br>
+
+# DetMetrics
+---
+:::ultralytics.yolo.utils.metrics.DetMetrics
+<br><br>
+
+# SegmentMetrics
+---
+:::ultralytics.yolo.utils.metrics.SegmentMetrics
+<br><br>
+
+# PoseMetrics
+---
+:::ultralytics.yolo.utils.metrics.PoseMetrics
+<br><br>
+
+# ClassifyMetrics
+---
+:::ultralytics.yolo.utils.metrics.ClassifyMetrics
+<br><br>
+
+# box_area
+---
+:::ultralytics.yolo.utils.metrics.box_area
+<br><br>
+
+# bbox_ioa
+---
+:::ultralytics.yolo.utils.metrics.bbox_ioa
+<br><br>
+
+# box_iou
+---
+:::ultralytics.yolo.utils.metrics.box_iou
+<br><br>
+
+# bbox_iou
+---
+:::ultralytics.yolo.utils.metrics.bbox_iou
+<br><br>
+
+# mask_iou
+---
+:::ultralytics.yolo.utils.metrics.mask_iou
+<br><br>
+
+# kpt_iou
+---
+:::ultralytics.yolo.utils.metrics.kpt_iou
+<br><br>
+
+# smooth_BCE
+---
+:::ultralytics.yolo.utils.metrics.smooth_BCE
+<br><br>
+
+# smooth
+---
+:::ultralytics.yolo.utils.metrics.smooth
+<br><br>
+
+# plot_pr_curve
+---
+:::ultralytics.yolo.utils.metrics.plot_pr_curve
+<br><br>
+
+# plot_mc_curve
+---
+:::ultralytics.yolo.utils.metrics.plot_mc_curve
+<br><br>
+
+# compute_ap
+---
+:::ultralytics.yolo.utils.metrics.compute_ap
+<br><br>
+
+# ap_per_class
+---
+:::ultralytics.yolo.utils.metrics.ap_per_class
+<br><br>