Feature Request: Instead of `--embedding huggingface` allow path to model

[catbears]

Hi, I want to suggest the feature, to use a local model from a models path.

Example

dr-doc-search --train -i my_pdf.pdf --path "my_models/ggml-model-14_0.bin"

It'd make the reuse of models easier and allow people with a restricted internet connection (company proxy in my case) to download models the way they can and use them later on.

Having that would be awesome!