Allow local Development without pip install using "pip install -e ."

[bszollosinagy]

Background

AutoGPT is now started with python -m autogpt, but that can fail if the user simply cloned the repository, and did not install it via pip. Usually, pip install -e . is enough to install the source code into PIP, but for that to work, the changes from this PR are necessary (mainly because pip finds other directories such as "output" and "log", and confuses it).

Changes

Simply added a [tool.setuptools] section to pyproject.toml. This is enough for pip install -e . to work properly.

Documentation

This PR is the documentation.

Test Plan

Tested locally. It does not break things, yet works for the intended purpose.

PR Quality Checklist

• My pull request is atomic and focuses on a single change.
• I have thoroughly tested my changes with multiple different prompts.
• I have considered potential risks and mitigations for my changes.
• I have documented my changes clearly and comprehensively.
• I have not snuck in any "extra" small tweaks changes