Add config options to documentation site

[lc0rp]

Background

We get many support requests about things that are configurable, but aren't in the docs. The options.md file that describes the .env options exists but isn't linked from mkdocs.yaml, so it doesn't show up in the online docs at agpt.co/docs

Changes

Added options.md to mkdocs.yaml

Documentation

This is a documentation change

Test Plan

I ran mkdocs locally and confirmed the change.

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.
• I have run the following commands against my code to ensure it passes our linters:

  black .
  isort .
  mypy
  autoflake --remove-all-unused-imports --recursive --ignore-init-module-imports --ignore-pass-after-docstring autogpt tests --in-place

[netlify]

✅ Deploy Preview for auto-gpt-docs canceled.

Name	Link
🔨 Latest commit	d60a726
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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (12d1263) 51.07% compared to head (d60a726) 51.07%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5034   +/-   ##
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  Coverage   51.07%   51.07%           
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  Files         119      119           
  Lines        4973     4973           
  Branches      664      664           
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  Hits         2540     2540           
  Misses       2236     2236           
  Partials      197      197           

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