Expose Core console log format

[Sushisource]

What was changed

Added LoggingFormat and LoggingConfig.format so applications can select compact, pretty, or newline-delimited JSON output for Core logs written to the console. The selected format is validated and passed through the Python bridge to Core.

Why?

Applications that ingest logs as structured data need Core to emit JSON directly instead of human-oriented text with ANSI formatting.

Checklist

1. Closes [python] Allow configuring core tracing format #1732
2. How was this tested:
   • poe format
   • poe build-develop
   • focused Pyright, mypy, basedpyright, and pydocstyle checks
   • cargo clippy --manifest-path temporalio/bridge/Cargo.toml -- -D warnings
   • uv run pytest tests/test_runtime.py::test_runtime_console_logging_format -q
3. Any docs updates needed? Public API docstrings and the changelog are updated.