[enhancement]: Model Manager - Grouping checkpoint models by category

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Contact Details

_No response_

### What should this feature add?

When using any Stable Diffusion webui, we use many checkpoint models. I think grouping them into categories would improve the speed of user workflow. I know currently Invoke is grouping models into SD1.5 and SDXL categories but that is not enough.

For example,

SD1.5
|— Category One
-------- Model A
-------- Model B
|— Category Two
-------- Model A
-------- Model B
-------- Model C

SDXL
|— Category One
-------- Model A
-------- Model B
|— Category Two
-------- Model A
-------- Model B
-------- Model C

### Alternatives

_No response_

### Additional Content

_No response_