examples の E2E テスト 第一弾

[voluntas]

This pull request includes significant updates to the build and testing workflows, documentation, dependencies, and example code for the Sora Python SDK. The most important changes include the addition of end-to-end testing workflows, updates to the examples folder, and enhancements to the pyproject.toml file.

Workflow and Testing Enhancements:

• .github/workflows/build.yml: Updated to ignore changes in the examples directory instead of the doc directory.
• .github/workflows/examples-e2e-test.yml: Added a new workflow for end-to-end testing of examples across multiple OS and Python versions, including Slack notifications for test results.

Documentation Updates:

• CHANGES.md: Added a fix to specify virtual = true in the examples configuration to avoid errors.
• examples/README.md: Updated the setup instructions and reorganized the content for clarity.

Dependency Management:

• examples/pyproject.toml: Added numpy to the dependencies and pytest to the dev-dependencies. Also, included a new section for pytest options. [1] [2] [3]

Example Code Enhancements:

• examples/src/media/__init__.py: Added new classes Sendonly and Recvonly for handling video and audio streams with detailed docstrings and methods for connecting, disconnecting, and running the main loop.