Add categories to command registry

[Pwuts]

Background

In order to build better prompts and make agents with access to different sets of abilities, the CommandRegistry needs extension to accommodate categories of commands.

Changes

• Add categories attribute to CommandRegistry class
• Move command loading code from main.py into CommandRegistry
• Add name and title attributes to command modules

Documentation

No changes needed

Test Plan

CI

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 failed.

Name	Link
🔨 Latest commit	0acd543
🔍 Latest deploy log	https://app.netlify.com/sites/auto-gpt-docs/deploys/64c576befbd1bd0008b35a9a

[codecov]

Codecov Report

Patch coverage: 76.33% and project coverage change: +0.32% 🎉

Comparison is base (c8d9b69) 51.18% compared to head (0acd543) 51.50%.
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5063      +/-   ##
==========================================
+ Coverage   51.18%   51.50%   +0.32%     
==========================================
  Files         116      116              
  Lines        4937     4982      +45     
  Branches      663      670       +7     
==========================================
+ Hits         2527     2566      +39     
- Misses       2216     2217       +1     
- Partials      194      199       +5     

Files Changed	Coverage Δ
autogpt/app/main.py	42.08% <0.00%> (+2.33%)	⬆️
autogpt/commands/__init__.py	100.00% <ø> (ø)
autogpt/core/runner/cli_web_app/server/api.py	0.00% <0.00%> (ø)
autogpt/models/command_registry.py	64.42% <56.00%> (-7.25%)	⬇️
autogpt/config/ai_config.py	73.68% <75.00%> (-2.59%)	⬇️
autogpt/agents/base.py	71.75% <86.36%> (+2.52%)	⬆️
autogpt/agents/agent.py	50.00% <100.00%> (ø)
autogpt/app/setup.py	73.41% <100.00%> (+0.34%)	⬆️
autogpt/commands/execute_code.py	72.47% <100.00%> (+0.51%)	⬆️
autogpt/commands/file_operations.py	82.67% <100.00%> (+0.13%)	⬆️
... and 10 more

... and 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.