[feature] add support for gemini-dfresnet

[wsstriving]

Add initial support for the structure described in

Liu T, Lee K A, Wang Q, et al. Golden Gemini is All You Need: Finding the Sweet Spots for Speaker Verification[J]. arXiv preprint arXiv:2312.03620, 2023.

Note that the optimization setups is different with the default one as in wespeaker, more results will be added later

[wsstriving]

To Do:

• [x] Add more descriptions and results to the README in the VoxCeleb Recipe
• [x] Add pretrained model to the pretrained page