Refactor/rename agent subpackage to agents

[collijk]

Background

#4799 is working on a bunch of important tasks, but includes a rename refactor which makes the PR hard to review for details.

Changes

• Rename the agent subpackage to agents.

Documentation

X

Test Plan

CI and manual testing

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	f9fced5
🔍 Latest deploy log	https://app.netlify.com/sites/auto-gpt-docs/deploys/64b00a0e0042e1000774250f

[codecov]

Codecov Report

Patch coverage: 84.61% and no project coverage change.

Comparison is base (4177c37) 51.00% compared to head (8a5036d) 51.00%.

❗ Current head 8a5036d differs from pull request most recent head f9fced5. Consider uploading reports for the commit f9fced5 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4961   +/-   ##
=======================================
  Coverage   51.00%   51.00%           
=======================================
  Files         118      118           
  Lines        4884     4884           
  Branches      643      643           
=======================================
  Hits         2491     2491           
  Misses       2212     2212           
  Partials      181      181           

Impacted Files	Coverage Δ
autogpt/agents/agent.py	54.11% <ø> (ø)
autogpt/llm/chat.py	60.97% <0.00%> (ø)
autogpt/memory/message_history.py	81.72% <0.00%> (ø)
autogpt/agents/__init__.py	100.00% <100.00%> (ø)
autogpt/commands/decorators.py	78.94% <100.00%> (ø)
autogpt/commands/execute_code.py	71.96% <100.00%> (ø)
autogpt/commands/file_operations.py	82.48% <100.00%> (ø)
autogpt/commands/git_operations.py	93.75% <100.00%> (ø)
autogpt/commands/image_gen.py	74.32% <100.00%> (ø)
autogpt/commands/task_statuses.py	100.00% <100.00%> (ø)
... and 3 more

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[Pwuts]

Thanks for this!