Add Visualized BGE model.

[muazhari]

Please add the Visualized BGE (especially M3) model from https://github.com/FlagOpen/FlagEmbedding/tree/master/FlagEmbedding/visual. Thanks :D.

[wxywb]

Thanks for your advice, currently we focus on text processing, we will also consider such multi-modal model later.