Add stable-diffusion model wrapper

[cmgzn]

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name: Pull Request about: Create a pull request

Description

add stable-diffusion model wrapper Integrate https://github.com/AUTOMATIC1111/stable-diffusion-webui

Checklist

Please check the following items before code is ready to be reviewed.

• [x] Code has passed all tests
• [x] Docstrings have been added/updated in Google Style
• [ ] Documentation has been updated
• [x] Code is ready for review

[rayrayraykk]

And please pass the UT, thx!

[cmgzn]

I've made some updates to the PR:

1. Replaced the custom request with the third-party package webuiapi. Let me know if this is suitable for the project or if you prefer a different approach.
2. I've wrapped the SD model as a callable agent service (similar to 'dashscope_services'), as I realized that directly conversing with the text2img model was not a good idea. But the dialogue agent for direct conversation with the SD model is still available and can be modified based on your feedback.

[rayrayraykk]

Could you please further provide a minimal hardware requirement for running this demo on README? And the other part looks good to me. @DavdGao Please have a look at this PR.

[DavdGao]

Closing for new version migration