release: v2.0.0

[FlanChanXwO]

Close #20 #17

Summary

• release v2.0.0 with the src-based architecture refactor
• add changelog entry for v2.0.0 and bump plugin metadata version
• include command simplification, provider/config fixes, and logging improvements

Verification

• python -m py_compile main.py src//*.py tests//*.py
• PYTHONPATH=/Users/flanchan/Development/SourceCode/GithubProjects/AstrbotPluginDev/data/plugins python -m pytest tests/shared/test_config_models.py tests/test_main_config_source.py tests/infrastructure/test_provider_init_from_config.py tests/application/test_provider_proxy_rewrite.py tests/application/test_image_provider_logging.py tests/infrastructure/test_image_sender.py tests/test_main_command_routing.py tests/modules/test_fortune_module.py tests/modules/test_setu_module.py

[sourcery-ai]

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