feat(model): Support gemma-2 model

[fangyinc]

Description

• Support gemma-2 models
• Support DeepSeek-Coder-V2-Instruct

How Has This Been Tested?

gemma-2

Install latest transformers.

pip install -U "transformers>=4.42.1"

Modify your .env

LLM_MODEL=gemma-2-9b-it
# LLM_MODEL=gemma-2-27b-it

DeepSeek-Coder

Modify your .env

LLM_MODEL=deepseek-coder-v2-lite-instruct
# LLM_MODEL=deepseek-coder-v2-instruct

Snapshots:

Include snapshots for easier review.

Checklist:

• My code follows the style guidelines of this project
• I have already rebased the commits and make the commit message conform to the project standard.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules

[csunny]

r+

[Aries-ckt]

r+