Summary

• Add shared runtime command resolution for tuner-aware infrared remotes.
• Add Japanese TV tuner support for DTV, BS, CS1, CS2, BS4K, and CS4K.
• Add a tuner select entity when tuner-specific keypad support is detected.
• Route remote, button, and TV media player sends through shared runtime state.
• Update tuner state from matched non-repeat received commands.
• Add integration-flow tests covering shared runtime behavior across entities.
• Bump version to 0.5.0 and update documentation.

Testing

• python -m compileall custom_components/universal_remote tests
• ruff check custom_components/universal_remote tests
• mypy custom_components/universal_remote tests
• pytest --cov=custom_components.universal_remote --cov-report=term-missing tests

Result: 507 passed, 100% coverage.