Support for Upstage LLM and Embeddings

[JuHyung-Son]

Is your feature request related to a problem? Please describe.
Feature request about adding llm and embedding provider Solar. It is number one llm provider in APAC. Can be used by their API or aws jumpstart.

Solar shows very nice performance in Korean and Japanese. And Thai is coming soon.

If you agree, I'll work on it and give you a PR.

Additional context
See more about Solar.

https://www.predibase.com/blog/solar-llm-on-predibase-the-best-llm-for-fine-tuning?utm_medium=partner&utm_source=upstage
https://www.linkedin.com/posts/leohp_openai-activity-7205473539208998912-w8-W/

[ItzCrazyKns]

Hi @JuHyung-Son, we've restructured how providers are created in Perplexica, you can now add (and maintain) the Solar provider. Here are the steps to add it:

1. First add the provider in the src/lib/providers folder, you can see how other providers are implemented and follow the same format to add the Solar provider.
2. Once that is done, you can add the provider into the providers list in the src/lib/providers/index.ts file.
3. After that, you need to add an input in the settings menu for the API key and pass it with the config, for more details see ui/components/SettingsDialog.tsx, src/config.ts, src/routes/config.ts.