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/50-evidence/evidence-index.md

@@ -0,0 +1,12 @@
+# Evidence Index
+
+Use this index for searchable, traceable evidence records.
+
+| Date | Topic | Status | Source | Detail |
+|---|---|---|---|---|
+
+## When To Add Evidence
+
+Add a topic file when a task depends on logs, commits, test output, external docs, bug reproduction, experiments, or postmortem-level reasoning.
+
+Keep task progress in `30-worklog/`; keep reusable workflow lessons in `60-reflection/`.