feat: added groq support via local option w/ auth

[cpacker]

Please describe the purpose of this pull request.

Adds Groq API support.

Note: Groq API doesn't support either function calling OR a raw /completions (not /chat/completions) API route. Because of this, we need to package our MemGPT prompt into a dummy user message inside the /chat/completions payload - this is very similar to how the lmstudio-legacy option works.

TODO in the future once Groq's API either allows function calling (and it stable / works well) and/or adds support for raw /completions endpoints, we should deprecate this code into groq-legacy similar to lmstudio-legacy.

How to test

(pymemgpt-PCQPn4ce-py3.10) (base) loaner@MacBook-Pro-55 MemGPT-2 % memgpt configure
Loading config from /Users/loaner/.memgpt/config
? Select LLM inference provider: local
? Select LLM backend (select 'openai' if you have an OpenAI compatible proxy): groq
? Enter default endpoint: https://api.groq.com/openai
? Enter your Groq API key: ********************************************************
? Select default model: mixtral-8x7b-32768
? Select default model wrapper (recommended: chatml): chatml
? Select your model's context window (for Mistral 7B models, this is probably 8k / 8192): 32768
? Select embedding provider: openai
? Select default preset: memgpt_chat
? Select default persona: sam_pov
? Select default human: basic
? Select storage backend for archival data: chroma
? Select chroma backend: persistent
? Select storage backend for recall data: sqlite
📖 Saving config to /Users/loaner/.memgpt/config

(pymemgpt-PCQPn4ce-py3.10) (base) loaner@MacBook-Pro-55 MemGPT-2 % memgpt run
Loading config from /Users/loaner/.memgpt/config

? Would you like to select an existing agent? No

🧬 Creating new agent...
->  🤖 Using persona profile: 'sam_pov'
->  🧑 Using human profile: 'basic'
Loading config from /Users/loaner/.memgpt/config
Loading config from /Users/loaner/.memgpt/config
🎉 Created new agent 'DecisiveSeashell' (id=d4666cde-aa82-44b2-bffd-bb0587bee324)

Hit enter to begin (will request first MemGPT message)

💭 User logged in. Welcome, Chad. Initiating persona protocols.
🤖 Hello Chad, I'm Sam. It's nice to meet you.
> Enter your message:

[sarahwooders]

lgtm!