feat: initial commit - Go + CGO captcha recognition service

Features:
- Go + CGO ONNX/OpenCV wrapper for high performance
- SQLite (default) / MySQL database support
- Optional Redis caching
- JWT authentication system
- Multiple captcha recognition APIs:
  - OCR text recognition
  - Slider captcha matching
  - Image similarity comparison
  - Rotation captcha detection
  - Object detection
- React frontend with install wizard
- Docker and docker-compose support
- Gitea CI/CD pipeline

Project structure:
- cmd/server: Main entry point
- internal/: Core business logic
- pkg/onnx: ONNX Runtime CGO wrapper
- pkg/opencv: OpenCV CGO wrapper
- web/: React frontend
- deploy/: Deployment configs
- scripts/: Utility scripts

scripts/install.sh

@@ -0,0 +1,107 @@
+#!/bin/bash
+
+# AntiCaptcha 安装脚本
+
+set -e
+
+echo "========================================="
+echo "   AntiCaptcha 安装脚本"
+echo "========================================="
+
+# 检查系统
+if [ ! -f /etc/os-release ]; then
+    echo "无法检测操作系统"
+    exit 1
+fi
+
+. /etc/os-release
+
+# 安装依赖
+install_deps() {
+    echo "正在安装依赖..."
+    
+    case "$ID" in
+        ubuntu|debian)
+            apt update
+            apt install -y libopencv-dev libonnxruntime-dev
+            ;;
+        centos|rhel|fedora)
+            yum install -y opencv-devel onnxruntime
+            ;;
+        alpine)
+            apk add --no-cache opencv onnxruntime
+            ;;
+        *)
+            echo "不支持的系统: $ID"
+            exit 1
+            ;;
+    esac
+}
+
+# 安装 Go
+install_go() {
+    if command -v go &> /dev/null; then
+        echo "Go 已安装: $(go version)"
+        return
+    fi
+    
+    echo "正在安装 Go..."
+    wget -q https://go.dev/dl/go1.22.5.linux-amd64.tar.gz
+    tar -C /usr/local -xzf go1.22.5.linux-amd64.tar.gz
+    rm go1.22.5.linux-amd64.tar.gz
+    
+    export PATH=$PATH:/usr/local/go/bin
+    echo 'export PATH=$PATH:/usr/local/go/bin' >> ~/.bashrc
+}
+
+# 构建项目
+build() {
+    echo "正在构建项目..."
+    go mod download
+    CGO_ENABLED=1 go build -o anticaptcha ./cmd/server
+}
+
+# 创建 systemd 服务
+create_service() {
+    echo "正在创建 systemd 服务..."
+    
+    cat > /etc/systemd/system/anticaptcha.service << EOF
+[Unit]
+Description=AntiCaptcha Service
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/opt/anticaptcha/anticaptcha
+WorkingDirectory=/opt/anticaptcha
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+    systemctl daemon-reload
+    systemctl enable anticaptcha
+}
+
+# 主流程
+main() {
+    install_deps
+    install_go
+    build
+    
+    echo ""
+    echo "========================================="
+    echo "   安装完成!"
+    echo "========================================="
+    echo ""
+    echo "运行方式:"
+    echo "  ./anticaptcha"
+    echo ""
+    echo "或创建 systemd 服务后:"
+    echo "  systemctl start anticaptcha"
+    echo ""
+}
+
+main "$@"