feat: allow user to change openai base url and model for LocalAI support

[barakplasma]

by changing the openai base url, we can use LocalAI to summarize articles instead of ChatGPT.
this also lets the user change the model (gpt-4 or gpt-3.5-turbo or openllama)

also bumps the dependencies for:
github.com/sashabaranov/go-openai v1.14.2
github.com/spf13/viper v1.16.0

my go linter removed a bunch of trailing spaces by accident

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I tested with and without the config for openai_base_url and openai_model to make sure it works for existing configs.

[piqoni]

Very cool, this looks quite useful. I cannot truly test this (I do have llama2 on one machine but dont have LocalAI) but LGTM :) Thanks for the addition!

[barakplasma]

By the way, this works with litellm openai proxy and ollama + mistralai as well

[krrishdholakia]

Hey @barakplasma any tweaks required for litellm proxy besides the int(time.time) patch?

[barakplasma]

@krr

Hey @barakplasma any tweaks required for litellm proxy besides the int(time.time) patch?

I don't think any other changes are needed. In my local patch I wrapped all the other occurrences of time time with int, but doing it at the top of main py should be enough