[Feat] Dora extraction

I use the Lora extraction option from a dreambooth or finetuned checkpoint all the time as it seems to produce better results than just training a Lora. Would love to see a way to extract Dora.

If it's just a parameter change in Lora to implement Dora I don't think it would be too difficult?

Start by tracing the existing LoRA extraction option and how it handles DreamBooth or finetuned checkpoints. Determine whether Dora requires more than a parameter change, then define the extraction behavior and verification criteria; done means Dora extraction works for the requested checkpoint types.

Written by the indexing model from the issue text.