Remove keys.py and replace with python-dotenv

[jcp]

• Removed keys.py.
• Added .env.template.
• Added .env to .gitignore.
• Updated various files that imported keys to use os.getenv instead.
• Updated requirements.txt dependencies and move to root directory.
• Updated README.md with instructions on setting up environment variables.

This change improves security, flexibility, and makes it easier to use Auto-GPT in notebooks. Environment variables are stored in .env and loaded via load_dotenv() in scripts/main.py.

[altryne]

The first thing I wanted to do since opening this repo 5 minutes ago, is this PR.
Kudos to the author, LGTM, please merge

[altryne]

Added my api in .env, and getting this error:

[altryne]

All files apparently need load_dotenv for this to work, not only main.py
I was able to fix this when I added

import dotenv
dotenv.load_dotenv()

To both chat.py and speak.py

[jcp]

@altryne You're right. Typically that's not required. But given the way the app is structured, load_dotenv() needs to be called in main.py, chat.py and speak.py. I've pushed a fix: 5e746af.

Ideally, with some additional refactoring, this can be avoided.

[Torantulino]

Excellent work, thank you.