Command line interface for accessing the Open Web Index shards and slices.

feat(cli): add Typer-based CLI prototype with remote ls command master

New package: owilix/cli/ - __init__.py: Main Typer app with global options (-v, -f, -o, --no-display) - __main__.py: Module execution support - _common/context.py: Pydantic CLIContext for typed context - _common/output.py: OutputWriter (table/json/jsonl) - remote.py: remote ls command implementation Features: - remote ls all - Lists datasets in Rich table - remote ls lrz:latest - Filter by specifier - -f json/jsonl output formats - -o file output redirection TODO: - Integrate with ui.py for centralized UI - Harmonize logging (display vs file log levels) - Migrate remaining commands