[Feature] Able to set Conv layer padding mode

[Nisekoixmy]

Hello folks,

Although there are some ways to generate tileable textures, like setting Conv layer padding mode to "circle" when generating, however, this kind of operation would greatly impact results with a bad influence. Hence, during training, if we are able to set the padding mode to "circle" by natural, then the trained model would have a good performance at generating tiling images when enable "tiling" feature in A1111.

This feature is often lacking in current finetuning tools on the market, which would make OneTrainer unique if it provided this feature during training.

Best regards.