feat(ecc): prune plugin 43→12 items, promote 7 rules to .claude/rules/ (#245)

ECC community plugin pruning: removed 530+ non-essential files
(.cursor/, .opencode/, docs/ja-JP, docs/zh-CN, docs/zh-TW,
language-specific skills/agents/rules). Retained 4 agents,
3 commands, 5 skills. Promoted 13 rule files (8 common + 5
typescript) to .claude/rules/ for CC native loading. Extracted
reusable patterns to EXTRACTED-PATTERNS.md.

docs/zh-CN/commands/setup-pm.md

@@ -1,83 +0,0 @@
----
-description: 配置您首选的包管理器（npm/pnpm/yarn/bun）
-disable-model-invocation: true
----
-
-# 包管理器设置
-
-配置您为此项目或全局偏好的包管理器。
-
-## 使用方式
-
-```bash
-# Detect current package manager
-node scripts/setup-package-manager.js --detect
-
-# Set global preference
-node scripts/setup-package-manager.js --global pnpm
-
-# Set project preference
-node scripts/setup-package-manager.js --project bun
-
-# List available package managers
-node scripts/setup-package-manager.js --list
-```
-
-## 检测优先级
-
-在确定使用哪个包管理器时，会按以下顺序检查：
-
-1. **环境变量**：`CLAUDE_PACKAGE_MANAGER`
-2. **项目配置**：`.claude/package-manager.json`
-3. **package.json**：`packageManager` 字段
-4. **锁文件**：package-lock.json、yarn.lock、pnpm-lock.yaml 或 bun.lockb 的存在
-5. **全局配置**：`~/.claude/package-manager.json`
-6. **回退方案**：第一个可用的包管理器 (pnpm > bun > yarn > npm)
-
-## 配置文件
-
-### 全局配置
-
-```json
-// ~/.claude/package-manager.json
-{
-  "packageManager": "pnpm"
-}
-```
-
-### 项目配置
-
-```json
-// .claude/package-manager.json
-{
-  "packageManager": "bun"
-}
-```
-
-### package.json
-
-```json
-{
-  "packageManager": "pnpm@8.6.0"
-}
-```
-
-## 环境变量
-
-设置 `CLAUDE_PACKAGE_MANAGER` 以覆盖所有其他检测方法：
-
-```bash
-# Windows (PowerShell)
-$env:CLAUDE_PACKAGE_MANAGER = "pnpm"
-
-# macOS/Linux
-export CLAUDE_PACKAGE_MANAGER=pnpm
-```
-
-## 运行检测
-
-要查看当前包管理器检测结果，请运行：
-
-```bash
-node scripts/setup-package-manager.js --detect
-```