Prepare updated PR description for YOLO family model verification (#3750)

[Copilot]

This PR provides an updated description for pull request #3750 to accurately reflect its scope. The original PR description indicated it only supported "YOLOv8n model check" but the actual implementation provides comprehensive verification infrastructure for a family of YOLO models.

Problem

PR #3750's description was misleading because:

• Title: Claimed to add "YOLOv8n model check" only
• Description: Focused on single model verification
• Actual Implementation: Supports 5 different YOLO model variants (yolov5s, yolov8n, yolov8s, yolov10n, yolo11x)

Analysis of Actual Implementation

The PR #3750 code review revealed:

1. Unified Architecture: Renamed from yolo11x to generic yolo crate supporting multiple models
2. Flexible Build System: Uses YOLO_MODEL environment variable for model selection at build time
3. Comprehensive Model Support: Python script supports downloading and processing 5 different YOLO variants
4. Multi-Model Testing: Rust test runner adapts to different model architectures and output formats

Solution Provided

Created a comprehensive updated PR description that:

• Corrects the title to reflect "YOLO family model checks" instead of single model
• Documents all supported models with clear verification status table
• Explains the unified architecture and build-time model selection mechanism
• Provides usage examples for working with different YOLO variants
• Documents known limitations including Metal backend issues and YOLOv10n TopK operator constraints
• Maintains original PR structure while accurately representing the scope

The updated description includes a detailed verification status table showing testing results across different backends for each supported YOLO model variant, providing clear visibility into what works and what has known issues.

This ensures the PR description accurately represents the significant infrastructure work that enables comprehensive YOLO family model verification in Burn.

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[laggui]

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