Add installation instructions and one-click install script

- Add README.md with manual installation guide
- Add install.sh for automated installation
- Support both manual and automated workflows

Co-Authored-By: Claude <noreply@anthropic.com>

install.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+# Claude Code Skills 安装脚本
+# 用法: bash <(curl -s https://git.let5see.xyz/let5see/skills/raw/main/install.sh)
+
+set -e
+
+REPO_URL="https://git.let5see.xyz/let5see/skills.git"
+TEMP_DIR="/tmp/skills-install-$$"
+SKILLS_DIR="$HOME/.claude/skills"
+
+echo "🚀 正在安装 Claude Code Skills..."
+echo ""
+
+# 创建临时目录
+echo "📦 下载 skills..."
+git clone "$REPO_URL" "$TEMP_DIR" --depth 1
+
+# 确保 skills 目录存在
+mkdir -p "$SKILLS_DIR"
+
+# 复制所有 skills
+echo "📋 安装 skills..."
+for skill_dir in "$TEMP_DIR"/*/; do
+    if [ -d "$skill_dir" ]; then
+        skill_name=$(basename "$skill_dir")
+        if [ -f "$skill_dir/SKILL.md" ]; then
+            echo "  ✓ 安装 $skill_name"
+            cp -r "$skill_dir" "$SKILLS_DIR/"
+        else
+            echo "  ⚠ 跳过 $skill_name (缺少 SKILL.md)"
+        fi
+    fi
+done
+
+# 清理临时文件
+rm -rf "$TEMP_DIR"
+
+echo ""
+echo "✅ 安装完成！"
+echo ""
+echo "已安装的 skills:"
+ls -1 "$SKILLS_DIR" | sed 's/^/  - /'
+echo ""
+echo "提示: 重启 Claude Code 以加载新的 skills"