Consider Add K-Net and Video K-Net

[lxtGH]

Hi! Both works use kernels (simular to object query) to build unified and end-to-end segmentation models for images and video. K-Net, NeurIPS 2021. https://arxiv.org/abs/2106.14855 Video K-Net, CVPR-2022. https://arxiv.org/abs/2204.04656