[Feature Request]: Asymmetric tiling

Is there an existing issue for this?

• I have searched the existing issues and checked the recent builds/commits

What would your feature do ?

Simply, to give the option of tiling only on the X or Y axis.

Proposed workflow

1. Turn on tiling
2. Select either X or Y axis, or select both

Additional information

I previously used the following extension for Auto1111:

https://github.com/tjm35/asymmetric-tiling-sd-webui

They do not intend to rewrite their extension to work with Forge unfortunately. - https://github.com/tjm35/asymmetric-tiling-sd-webui/issues/16

But perhaps this extension can be used to help either adapt the existing tiling feature in Forge, or perhaps this extension as a whole could be adapted to work with or become built in to Forge. In my experience it's a good, light extension which has worked well for me in the past.

Start by locating Forge's existing tiling implementation and comparing its behavior with the referenced Auto1111 asymmetric-tiling extension. Trace how the tiling option is exposed in the interface and applied during generation. Done means users can enable tiling independently on the X axis, Y axis, or both, with each selection producing the expected result.