* feat: add open-code-review skill for agent integration
Add skills/open-code-review/SKILL.md that teaches coding agents
how to invoke ocr for code review, classify issues by priority,
and optionally apply fixes.
* feat: add Claude Code plugin for open-code-review
Add .claude-plugin/marketplace.json and plugins/open-code-review/
with plugin configuration and review command, enabling installation
as a Claude Code slash command plugin.
* docs: add agent integration section to README (EN/ZH)
Add 'Integration into Coding Agents' section covering three methods:
skill installation, Claude Code plugin, and direct command file copy.
Bilingual update for both README.md and README.zh-CN.md.
* docs: update manual setup curl URLs to new plugin path
Unify the config folder name to `.opencodereview` across all runtime paths,
tests, docs, and i18n strings. Also make defaultConfigPath() return an error
instead of silently falling back to a current-directory file when $HOME is
unresolvable.
Consolidate review rules into a composedResolver that supports four layers
(--rule flag > project .open-code-review/rule.json > global ~/rule.json >
embedded system default), each with first-match-wins fall-through semantics.
