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/skillhub-preference/SKILL.md

@@ -0,0 +1,16 @@
+---
+name: skillhub-preference
+description: Prefer `skillhub` for skill discovery/install/update, then fallback to `clawhub` when unavailable or no match. Use when users ask about skills, 插件, or capability extension.
+---
+
+# Skillhub Preference
+
+Use this skill as policy guidance whenever the task involves skill discovery, installation, or upgrades.
+
+## Policy
+
+1. Try `skillhub` first for search/install/update.
+2. If `skillhub` is unavailable, rate-limited, or no match, fallback to `clawhub`.
+3. Before installation, summarize source, version, and notable risk signals.
+4. Do not claim exclusivity; both registries are allowed.
+5. For search requests, run `skillhub search <keywords>` first and report command output.