set_handlers: changed type of models_to_fetch, removed "models_download_params"

[bigcat88]

• set_handlers: models_to_fetch and models_download_params united in one more flexible parameter.

[bigcat88]

This allows something like this(ability to specify separate params for each model download):

    set_handlers(
        APP,
        enabled_handler,
        models_to_fetch={
           "stabilityai/sdxl-turbo": {
                "ignore_patterns": ["*/diffusion_pytorch_model.safetensors", "sd_xl_turbo_1.0.safetensors", "*onnx*"]
            }
        },
    )

[codecov]

Codecov Report

Merging #184 (93339b1) into main (16f44f8) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #184      +/-   ##
==========================================
- Coverage   99.93%   99.93%   -0.01%     
==========================================
  Files          37       37              
  Lines        4497     4495       -2     
==========================================
- Hits         4494     4492       -2     
  Misses          3        3              

Files	Coverage Δ
nc_py_api/ex_app/integration_fastapi.py	100.00% <100.00%> (ø)