Setup dotenv about llm-vm

[dorkitude]

This should be achievable using dynaconf in lieu of python-dotenv, but it's possible we have a bug in the .env loader.

Want to take a look at our logic, @roopeshsn ?

The relevant section to test is in /src/llm_vm/config.py:

settings = Dynaconf(
    settings_file=config_files,
    load_dotenv=True,
    dotenv_path=".env",
    envvar_prefix="LLM_VM",
)

[cartazio]

i think we have a config system already, so closing for now, please comment if i'm incorrect