text: Title: [Feature Request]: Add Hypernetwork Refresh API for API Mode.
  Body: ### Is there an existing issue for this?
  
  - [x] I have searched the existing issues and checked the recent builds/commits
  
  ### What would your feature do ?
  
  Hello,
  
  I've recently been working with Stable Diffusion and my project is deployed on a server, necessitating operation via API mode. I noticed that the API includes functions like refresh-checkpoints / reload-checkpoint. However, I've found there's no API for updating the hypernetwork list. This absence means that when new .pt files are added during service operation, they cannot be immediately read, and a complete service restart is required.
  
  As an aside, I noticed there's a refresh button in the web API, but I couldn't find a corresponding API endpoint.
  <img width="599" alt="image" src="https://github.com/AUTOMATIC1111/stable-diffusion-webui/assets/83401245/d3ef66d1-4a65-4259-b613-12cfaa3ad8e4">
  
  
  Lastly, I apologize as my English is not very strong and my coding skills are somewhat limited. I appreciate any guidance or advice.
  
  Thank you.
  
  my stable-diffusion-webui version : 1.4.1
  