feat: 初始化黄小瓜AI助手记忆仓库

- 核心配置: IDENTITY, USER, SOUL, AGENTS, TOOLS, HEARTBEAT, MEMORY
- memory/: 每日总结和临时记录
- skills/: 所有已安装技能
- notes/: 语音配置笔记

skills/self-improving-agent/.learnings/LEARNINGS.md

@@ -0,0 +1,5 @@
+# Learnings Log
+
+Captured learnings, corrections, and discoveries. Review before major tasks.
+
+---