初始化 Makelore 项目协作文档

需求：为客户端修复任务建立独立 worktree 所有权与项目记忆门禁。

实现：引入标准 .project-docs 模板，不修改现有客户端业务代码。

.project-docs/00-brief/success-criteria.md

@@ -0,0 +1,17 @@
+# Success Criteria
+
+## Project Success
+
+- {observable project-level success condition}
+
+## Task Completion Standard
+
+- {condition that means a task is complete}
+
+## Quality Checks
+
+- {verification command, review expectation, or acceptance check}
+
+## Last Reviewed
+
+{YYYY-MM-DD}