Add option to configure a custom reranker in OCL Mapper Project Config

[paynejd]

• Add a new "Reranker Configuration" section with a textbox/dropdown to OCL Mapper Project Config to set the reranker model -- default the value to the current model, and allow editing
  • After the target repo/algo/lookup config, before AI Assistant and Field Mapping config
• This section is only visible to users with appropriate permissions (e.g. "core team") -- users that do not have access will maintain current behavior (with a single always-on default reranker model)
• Unified score will be calculated using the configured model

Question:

• Assuming that we can use any compatible model from hugging face?
• Does hugging face offer a way to retrieve a list of compatible models so that we can provide a dropdown, validate that it works, etc.?

[paynejd]

@snyaggarwal If this is a small lift, let's take care of this before end of Feb