Add ICT

[Dongdong Chen]

Hi, @dk-liang, please help add the below papers:

[ICT] High-Fidelity Pluralistic Image Completion with Transformers [paper], [code], ICCV 2021

[BEVT] BEVT: BERT Pretraining of Video Transformers [paper], [code], CVPR 2022

[PeCo] PeCo: Perceptual Codebook for BERT Pre-training of Vision Transformers [paper]

[MobileFormer] Mobile-Former: Bridging MobileNet and Transformer [paper], CVPR 2022

[Dingkang Liang]

added