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/skills/springboot-verification/SKILL.md

@@ -1,104 +0,0 @@
----
-name: springboot-verification
-description: Verification loop for Spring Boot projects: build, static analysis, tests with coverage, security scans, and diff review before release or PR.
----
-
-# Spring Boot 验证循环
-
-在提交 PR 前、重大变更后以及部署前运行。
-
-## 阶段 1：构建
-
-```bash
-mvn -T 4 clean verify -DskipTests
-# or
-./gradlew clean assemble -x test
-```
-
-如果构建失败，停止并修复。
-
-## 阶段 2：静态分析
-
-Maven（常用插件）：
-
-```bash
-mvn -T 4 spotbugs:check pmd:check checkstyle:check
-```
-
-Gradle（如果已配置）：
-
-```bash
-./gradlew checkstyleMain pmdMain spotbugsMain
-```
-
-## 阶段 3：测试 + 覆盖率
-
-```bash
-mvn -T 4 test
-mvn jacoco:report   # verify 80%+ coverage
-# or
-./gradlew test jacocoTestReport
-```
-
-报告：
-
-* 总测试数，通过/失败
-* 覆盖率百分比（行/分支）
-
-## 阶段 4：安全扫描
-
-```bash
-# Dependency CVEs
-mvn org.owasp:dependency-check-maven:check
-# or
-./gradlew dependencyCheckAnalyze
-
-# Secrets (git)
-git secrets --scan  # if configured
-```
-
-## 阶段 5：代码检查/格式化（可选关卡）
-
-```bash
-mvn spotless:apply   # if using Spotless plugin
-./gradlew spotlessApply
-```
-
-## 阶段 6：差异审查
-
-```bash
-git diff --stat
-git diff
-```
-
-检查清单：
-
-* 没有遗留调试日志（`System.out`、`log.debug` 没有防护）
-* 有意义的错误信息和 HTTP 状态码
-* 在需要的地方有事务和验证
-* 配置变更已记录
-
-## 输出模板
-
-```
-VERIFICATION REPORT
-===================
-Build:     [PASS/FAIL]
-Static:    [PASS/FAIL] (spotbugs/pmd/checkstyle)
-Tests:     [PASS/FAIL] (X/Y passed, Z% coverage)
-Security:  [PASS/FAIL] (CVE findings: N)
-Diff:      [X files changed]
-
-Overall:   [READY / NOT READY]
-
-Issues to Fix:
-1. ...
-2. ...
-```
-
-## 持续模式
-
-* 在重大变更时或长时间会话中每 30–60 分钟重新运行各阶段
-* 保持短循环：`mvn -T 4 test` + spotbugs 以获取快速反馈
-
-**记住**：快速反馈胜过意外惊喜。保持关卡严格——将警告视为生产系统中的缺陷。