Add negative prompt and aspect ratio flags to SD3 bots

[jamesr66a]

Add --no and --aspect flags to SD3 bots

Re: negative prompts:
SD3-Turbo does not support negative prompts as it does not use Classifier-Free Guidance (CFG)
Also be advised that negative prompts do not work in the same way for SD3 variants as with previous diffusion models, due to the new text encoder architecture. The community reports more insensitivity and randomness with respect to the negative prompt compared to e.g. SDXL or SD 1.5
We can still add the feature regardless, but it is likely not going to be what users expect