chore: remove Linux support to simplify project

Drop Linux startup script and all Linux references from README.
Only Mac + Windows supported going forward.

uclaw-scripts/Linux-从U盘启动.sh

@@ -1,82 +0,0 @@
-#!/bin/bash
-# ============================================================
-# U-Claw 虾盘 - Linux 一键启动
-# 用法: bash ./运行.sh
-# ============================================================
-
-set -e
-
-UCLAW_DIR="$(cd "$(dirname "$0")" && pwd)"
-OPENCLAW_DIR="$UCLAW_DIR/openclaw"
-NODE_DIR="$UCLAW_DIR/runtime/node-linux-x64"
-NODE_BIN="$NODE_DIR/bin/node"
-NPM_BIN="$NODE_DIR/bin/npm"
-PNPM_BIN="$NODE_DIR/bin/pnpm"
-
-GREEN='\033[0;32m'
-CYAN='\033[0;36m'
-RED='\033[0;31m'
-YELLOW='\033[1;33m'
-NC='\033[0m'
-
-echo ""
-echo -e "${CYAN}"
-echo "  ╔══════════════════════════════════════╗"
-echo "  ║     U-Claw 虾盘 v1.0                ║"
-echo "  ║     OpenClaw Linux 启动              ║"
-echo "  ╚══════════════════════════════════════╝"
-echo -e "${NC}"
-
-if [ ! -x "$NODE_BIN" ]; then
-    echo -e "  ${RED}错误: 找不到 Linux Node.js 运行环境${NC}"
-    echo "  请确保 runtime/node-linux-x64 目录完整"
-    exit 1
-fi
-
-export PATH="$NODE_DIR/bin:$PATH"
-
-ensure_pnpm() {
-    if [ -x "$PNPM_BIN" ]; then
-        return 0
-    fi
-
-    echo -e "  ${YELLOW}缺少 pnpm，正在补充安装...${NC}"
-    "$NPM_BIN" install -g pnpm --registry=https://registry.npmmirror.com
-
-    if [ ! -x "$PNPM_BIN" ]; then
-        echo -e "  ${RED}错误: pnpm 安装失败，无法继续构建${NC}"
-        exit 1
-    fi
-}
-
-echo -e "  Node.js 版本: ${GREEN}$("$NODE_BIN" --version)${NC}"
-echo ""
-
-if [ ! -d "$OPENCLAW_DIR/node_modules" ]; then
-    echo -e "  ${YELLOW}首次运行，正在安装依赖...${NC}"
-    cd "$OPENCLAW_DIR"
-    "$NPM_BIN" install --registry=https://registry.npmmirror.com
-    echo ""
-fi
-
-if [ ! -d "$OPENCLAW_DIR/dist" ]; then
-    echo -e "  ${YELLOW}首次运行，正在构建...${NC}"
-    cd "$OPENCLAW_DIR"
-    ensure_pnpm
-    "$PNPM_BIN" run build
-    if [ ! -d "$OPENCLAW_DIR/dist" ]; then
-        echo -e "  ${RED}构建失败，请检查错误信息${NC}"
-        exit 1
-    fi
-    echo ""
-fi
-
-cd "$OPENCLAW_DIR"
-
-if [ ! -f "$HOME/.openclaw/openclaw.json" ]; then
-    echo -e "  ${YELLOW}首次配置...${NC}"
-    "$NODE_BIN" openclaw.mjs onboard --install-daemon
-fi
-
-echo -e "  ${CYAN}启动 OpenClaw 服务...${NC}"
-"$NODE_BIN" openclaw.mjs || "$NPM_BIN" start