Rebase MessageHistory on ChatSequence

[Pwuts]

Background

Part of #4799

The MessageHistory was already very similar to the ChatSequence. Now they are also compatible/interoperable (up to a degree).

Changes

• Refine ChatSequence implementation
  • Adjust methods to support subclassing
• Rebase MessageHistory class on ChatSequence
• Update usages of MessageHistory
• Add overloads to count_message_tokens to allow passing a single message

Documentation

x

Test Plan

CI + 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	89ebbe3
🔍 Latest deploy log	https://app.netlify.com/sites/auto-gpt-docs/deploys/64aae7d286194d0008e5d55a

[codecov]

Codecov Report

Patch coverage: 78.12% and project coverage change: -0.06 ⚠️

Comparison is base (f6da992) 50.55% compared to head (b6a36bd) 50.50%.

❗ Current head b6a36bd differs from pull request most recent head 89ebbe3. Consider uploading reports for the commit 89ebbe3 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4922      +/-   ##
==========================================
- Coverage   50.55%   50.50%   -0.06%     
==========================================
  Files         116      116              
  Lines        4860     4875      +15     
  Branches      657      662       +5     
==========================================
+ Hits         2457     2462       +5     
- Misses       2219     2226       +7     
- Partials      184      187       +3     

Impacted Files	Coverage Δ
autogpt/llm/base.py	85.85% <65.00%> (-5.06%)	⬇️
autogpt/llm/chat.py	66.23% <71.42%> (ø)
autogpt/llm/utils/token_counter.py	82.50% <77.77%> (-1.88%)	⬇️
autogpt/memory/message_history.py	81.91% <88.88%> (-2.78%)	⬇️
autogpt/agent/agent.py	59.18% <100.00%> (ø)

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

[collijk]

Two small suggestions and a couple of questions, but otherwise in good shape.

[Auto-GPT-Bot]

You changed AutoGPT's behaviour. The cassettes have been updated and will be merged to the submodule when this Pull Request gets merged.