feat: CLI 명령어 시스템 및 실제 동작 테스트 구현

[gagip]

• 3개 서브커맨드 (parse/search/projects) 추가
• 다중 포맷 출력 지원 (text/json/csv)

[Copilot]

Pull Request Overview

This PR refactors the CLI from a single-command interface to a subcommand-based architecture with three commands: parse, search, and projects. It also adds comprehensive test coverage for formatters and CLI commands.

• Refactored CLI to use subcommands (parse, search, projects) instead of positional arguments
• Added output formatters (text, json, csv) for search results with corresponding tests
• Enhanced UTF-8 encoding support for stdout/stderr streams

Reviewed Changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
cli.py	Refactored from single-command to subcommand architecture with proper encoding setup
git_log_analysis/cli/init.py	New module exporting command setup functions
git_log_analysis/cli/types.py	Type definitions for CLI argument parsers
git_log_analysis/cli/parse_command.py	Parse subcommand implementation
git_log_analysis/cli/search_command.py	Search subcommand with filtering and output format options
git_log_analysis/cli/projects_command.py	Projects subcommand showing available projects and statistics
git_log_analysis/cli/formatters.py	Output formatters for text, JSON, and CSV formats
git_log_analysis/mcp/data_loader.py	Added UTF-8 encoding configuration for logging
tests/test_formatter.py	Comprehensive tests for all formatters
tests/test_cli_commands.py	Integration tests for CLI commands via subprocess
CLAUDE.md	Updated documentation with new CLI usage examples
.gitignore	Added settings.local.json to ignore list

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[Copilot]

Accessing private API argparse._SubParsersAction is not recommended. Use the public type annotation argparse._SubParsersAction[argparse.ArgumentParser] or consider using typing.Any if type hints are needed.

Suggested change

	SubParser = argparse._SubParsersAction
	from typing import Any
	SubParser = Any