submit_gallery doesnt support body text

### Describe the solution you'd like On reddit I have the option to create a gallery and add a body text to it. But PRAW seems to miss this feature. Why is this feature not added yet? <img width="912" height="828" alt="Image" src="https://github.com/user-attachments/assets/27107be8-8ee8-4c70-a247-e3dfb4aa122c" /> ### Describe alternatives you've considered _No response_ ### Additional context _No response_