feat: publish Dever core with project scaffolding and versioned AI skills

.trellis/tasks/09-12-http2-performance/check.jsonl

@@ -0,0 +1,3 @@
+{"file":".trellis/spec/backend/toolchain-and-library.md","reason":"检查 HTTP/2 配置与运行时公开合同一致"}
+{"file":".trellis/spec/backend/quality-guidelines.md","reason":"检查测量公平性、计数完整性、资源预算和验证范围"}
+{"file":".trellis/tasks/09-12-http2-performance/research/current-benchmark-and-h2-api.md","reason":"核对实现是否真正拆分物理连接和并发流"}