[request] Please add support for more .pth files

[ForxBase]

Motivation
Please add support to convert more .pth files to .param for manga upscaling with apps like Upscayl.

Description
When trying to convert .pth files like from here

https://github.com/the-database/MangaJaNai/releases/tag/1.0.0

or

https://openmodeldb.info/models/4x-IllustrationJaNai-V1-DAT2

in chaiNNer I get error messages like

`Error

An error occurred in a pytorch Convert To NCNN node:

Shape not currently supported by NCNN.

Input values:
• PyTorch Model: Value of type 'spandrel.__helpers.model_descriptor.ImageModelDescriptor'
• Data Type: fp32`

or

`Error

An error occurred in a pytorch Convert To NCNN node:

DAT is not supported for NCNN conversions at this time.

Input values:
• PyTorch Model: Value of type 'spandrel.__helpers.model_descriptor.ImageModelDescriptor'
• Data Type: fp32`

Alternatives
Haven't found any alternative solutions or features.

Thank you.