add YOLOv12

[LiaoZihZrong]

Feature Description

Adaptive Dictionary Sizing: Dynamically adjust the number of RD dictionary atoms based on YOLOv12 model scale (N, S, M, L, X) to balance accuracy and inference cost across devices

[faridht]

I think the authors of yolo12 are not the same as yolo9 (different research group). So most likely we won't see yolo12 here.