[Feat]: Add seed and prompt to sample images

[RandomTurtle]

Describe your use-case.

When I use Automatic1111 to check the PNG info of an image generated using OneTrainer it says there is no prompt. There are great images I would like to re-generate using a different sampler but I don't have any way to find the seed and prompt.

What would you like to see as a solution?

Have you considered alternatives? List them here.

An alternative to attaching the seed and prompt to the image would be to output the seed and prompt to the command window, or a text file that (optionally) accompanies the image, if embedding into the image would be a lot of work.