refactor(auto-updater): simplify policy config to environment variable

[baleen37]

Summary

• config.json 기반 정책 설정을 환경 변수 방식으로 간소화
• 기본 정책을 patch에서 major로 변경
• README에서 불필요한 설정 파일 설명 제거 및 간소화
• update-checker.sh에서 get_update_policy() 함수 제거

Test plan

• 로컬에서 스크립트 정상 동작 확인
• BATS 테스트 통과

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com

Summary by CodeRabbit

• New Features

  • Auto Updater plugin simplified with improved update detection logic.

• Chores

  • Updated plugin version to 2.1.0.
  • Updated documentation with translated content and restructured information.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

The PR bumps the auto-updater plugin version to 2.1.0, rewrites the README from comprehensive English documentation to a minimal Korean overview, and simplifies the update-checker.sh script by removing the policy-based update decision system in favor of direct version comparison.

Changes

Cohort / File(s)	Summary
Plugin manifest version bump plugins/auto-updater/.claude-plugin/plugin.json	Version field updated from "2.0.0" to "2.1.0"
Documentation rewrite plugins/auto-updater/README.md	README converted from detailed English feature documentation to minimal Korean overview; removed sections on operation modes, installation/update workflows, configuration, policy options, commands, examples, troubleshooting, and architecture; retained only brief operational notes and new log viewing section
Update logic refactoring plugins/auto-updater/scripts/update-checker.sh	Removed CONFIG_FILE variable, DEFAULT_POLICY variable, and get_update_policy() function; simplified update decision logic to use direct version comparison (version_lt) instead of policy-based evaluation; added early-exit guard for empty MARKETPLACE_PLUGINS; preserved marketplace fetch/update flow but consolidated install/update paths

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• feat(auto-updater): add semver 2.0 pre-release support and file logging #25: Both modify auto-updater's version comparison logic (PR simplifies update-checker to call version_lt while retrieved PR refactors semver parsing).
• fix(auto-updater): align with actual claude plugin list output format #9: Both modify auto-updater's update-checker.sh and README, including changes around update policy handling (get_update_policy/CONFIG_FILE).

Suggested labels

released

Poem

🐰 Version hops from two to one-point-one,
Policies fall away like dust in the sun,
Korean words now guide the way,
Simpler paths for every day,
Update checker, sleek and lean! ✨

✨ Finishing touches

• 📝 Generate docstrings

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