[WIP] Add workflow to test multiple Python versions

[Copilot]

Plan: Add Multi-Python Version Testing Workflow

• Create new GitHub Actions workflow file .github/workflows/python-versions-test.yml
• Configure matrix strategy to test Python versions: 3.10, 3.11, 3.12, 3.13, 3.14-dev
• Use existing test infrastructure (pytest, pytest-asyncio, pytest-cov)
• Set up triggers for push to master, pull requests, and manual dispatch
• Ensure all required directories are created
• Test the workflow (validate YAML syntax)
• Add explicit permissions for security compliance
• Final verification

Summary

Created a new GitHub Actions workflow that tests AstrBot against multiple Python versions:

• Python 3.10
• Python 3.11
• Python 3.12
• Python 3.13
• Python 3.14-dev (pre-release)

The workflow:

• Uses a matrix strategy with fail-fast: false to ensure all Python versions are tested even if one fails
• Includes explicit permissions: contents: read for security compliance
• Follows the same test structure as the existing coverage_test.yml workflow
• Triggers on push to master, pull requests, and manual dispatch

Security Summary

• Added explicit permissions block to limit GITHUB_TOKEN access
• No vulnerabilities introduced

Original prompt

新增工作流：测试多种python版本（3.10，3.11，3.12，3.13，3.14）

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