feat: Allow uploading an SSL cert

[Fluffy9]

Problem
The API is unusable as a replacement for OpenAI. Any tool that allows you to use your API is only available over HTTPS, which is incompatible with the HTTP API Jan offers. I guess you should set up a reverse proxy but that defeats the purpose of "easy" and "useful". I want something that just works, while I consider setting up better infrastructure later.

Success Criteria
At the very least, please offer the user a way to upload a SSL cert. Use that to serve the API over https. Bonus points would be integrating Let'sEncrypt so everything is automated

Additional context
None

[socialnicheguru]

I am struggling with this right now.
I would like to be able to serve assets over https as I am attempting to install Jan on a remote server.
I have already setup nginx proxy.

[louis-jan]

@imtuyethan Feature request but not tracked in the roadmap. I'm not really sure that's part of our product vision.

[0xSage]

Moving this to Cortex repo as it is within Cortex product vision.

[dan-homebrew]

Linking previous discussion on https library: #1080