Add links to github issues in the README and clarify run instructions

[collijk]

Background

The existing readme lack references to other documentation resources and people have been having issues with the run instructions.

Changes

• Add an overview with links to relevant github issues.
• Add more clarity about installing autogpt and where to do it from (this was a user testing issue)
• Add more clarity about where a users home directory is on different platforms (this was a user testing issue)
• Add more clarity about what isn't being worked on (the cli web app) as this caused some user confusion.

Documentation

All Docs

Test Plan

X

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	ff6cda2
🔍 Latest deploy log	https://app.netlify.com/sites/auto-gpt-docs/deploys/64aecd38c4cab900073a7667

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (21c0cdc) 51.01% compared to head (ff6cda2) 51.01%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4954   +/-   ##
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  Coverage   51.01%   51.01%           
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  Files         119      119           
  Lines        4895     4895           
  Branches      643      643           
=======================================
  Hits         2497     2497           
  Misses       2217     2217           
  Partials      181      181           

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