fix(agent/execute_code): Disable code execution commands when Docker is unavailable

[kcze]

Background

Fix

Changes 🏗️

• Disable execute_python_code and execute_python_file if running outside Docker and Docker is unavailable.

PR Quality Scorecard ✨

• Have you used the PR description template?   +2 pts
• Is your pull request atomic, focusing on a single change?   +5 pts
• Have you linked the GitHub issue(s) that this PR addresses?   +5 pts
• Have you documented your changes clearly and comprehensively?   +5 pts
• Have you changed or added a feature?   -4 pts
  • Have you added/updated corresponding documentation?   +4 pts
  • Have you added/updated corresponding integration tests?   +5 pts
• Have you changed the behavior of AutoGPT?   -5 pts
  • Have you also run agbenchmark to verify that these changes do not regress performance?   +10 pts

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[Pwuts]

LGTM!

[Pwuts]

A nice addition would be to display a warning when starting the application, because users might still expect it to work.