feat: add Python single-file runner with console capture

[chriswritescode-dev]

Adds Python single-file execution support to :ConsoleLogRun. Runs .py files with a zero-dependency stdlib bootstrap (Python 3.8+) that captures print(), logging records, raw sys.stderr writes, and uncaught exceptions.

Features

• Python file detection: .py files recognized as single-file runnable
• Interpreter resolution: runner.python_executable config -> $VIRTUAL_ENV -> .venv/venv walking up from file -> system python3
• Console capture:
  • print() calls with source location (file + line number)
  • logging records at WARNING+ by default
  • Raw sys.stderr writes buffered per-line
  • Uncaught exceptions (including SyntaxError and non-zero SystemExit)
• Zero dependencies: Single stdlib-only Python 3.8+ script (py/consolelog_runner.py)

Files Changed

• lua/consolelog/communication/python_runner.lua - Python runner module
• lua/consolelog/core/constants.lua - Python file detection
• lua/consolelog/core/init.lua - Runner integration
• lua/consolelog/core/utils.lua - Utility functions
• py/consolelog_runner.py - Python bootstrap script
• tests/lua/python_capture_spec.lua - Capture tests
• tests/lua/python_runner_spec.lua - Runner tests
• tests/lua/single_file_run_spec.lua - Updated integration tests