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/ERRORS.md

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+# Errors Log
+
+Command failures, exceptions, and unexpected behaviors.
+
+---

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

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+# Feature Requests
+
+Capabilities requested by user that don't currently exist.
+
+---

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

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