feat: 初始化shop-crm-agent项目，实现基础CLI与CRM操作能力

本提交初始化完整的shop-crm-agent项目：
1. 创建基础项目结构与配置文件（.gitignore、go.mod/go.sum）
2. 添加项目许可协议与文档（README.md、AGENTS.md、SKILL.md）
3. 实现核心CLI入口与命令框架
4. 封装Protobuf API客户端与完整的命令实现
5. 添加单元测试覆盖核心功能与边界情况
6. 提供构建脚本与版本管理能力

scripts/build.go

@@ -0,0 +1,129 @@
+//go:build ignore
+
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strings"
+)
+
+const modulePath = "code.zhecent.com/open/shop-crm-agent"
+
+func main() {
+	if err := run(); err != nil {
+		_, _ = fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func run() error {
+	repoRoot, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+	if _, err := os.Stat(filepath.Join(repoRoot, "go.mod")); err != nil {
+		return errors.New("build.go must run from the shop-crm-agent repository root")
+	}
+	moduleCommand := exec.Command("go", "list", "-m", "-f", "{{.Path}}")
+	moduleCommand.Dir = repoRoot
+	moduleOutput, err := moduleCommand.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("read Go module path: %w: %s", err, strings.TrimSpace(string(moduleOutput)))
+	}
+	if actualModule := strings.TrimSpace(string(moduleOutput)); actualModule != modulePath {
+		return fmt.Errorf("unexpected Go module; want %s", modulePath)
+	}
+
+	env := withEnv(os.Environ(), "CGO_ENABLED", "0")
+	if err := runCommand(repoRoot, env, "go", "test", "./..."); err != nil {
+		return fmt.Errorf("test shop-crm-agent: %w", err)
+	}
+
+	version := gitVersion(repoRoot)
+	binaryName := "shop-crm-agent"
+	if runtime.GOOS == "windows" {
+		binaryName += ".exe"
+	}
+	binDir := filepath.Join(repoRoot, "bin")
+	if err := os.MkdirAll(binDir, 0o755); err != nil {
+		return err
+	}
+	tempFile, err := os.CreateTemp(binDir, "."+binaryName+".tmp-")
+	if err != nil {
+		return err
+	}
+	tempPath := tempFile.Name()
+	if err := tempFile.Close(); err != nil {
+		return err
+	}
+	if err := os.Remove(tempPath); err != nil {
+		return err
+	}
+	defer os.Remove(tempPath)
+
+	ldflags := "-s -w -X main.version=" + version
+	if err := runCommand(repoRoot, env, "go", "build", "-trimpath", "-ldflags", ldflags, "-o", tempPath, "./cmd/shop-crm-agent"); err != nil {
+		return fmt.Errorf("build shop-crm-agent: %w", err)
+	}
+	if runtime.GOOS != "windows" {
+		if err := os.Chmod(tempPath, 0o755); err != nil {
+			return err
+		}
+	}
+	probe := exec.Command(tempPath, "--version")
+	probe.Dir = repoRoot
+	probeOutput, err := probe.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("probe built binary: %w: %s", err, strings.TrimSpace(string(probeOutput)))
+	}
+
+	targetPath := filepath.Join(binDir, binaryName)
+	if err := replaceBinary(tempPath, targetPath); err != nil {
+		return err
+	}
+	fmt.Printf("installed: %s\n", filepath.Join("bin", binaryName))
+	fmt.Printf("version: %s\n", strings.TrimSpace(string(probeOutput)))
+	return nil
+}
+
+func gitVersion(repoRoot string) string {
+	command := exec.Command("git", "describe", "--tags", "--always", "--dirty")
+	command.Dir = repoRoot
+	output, err := command.Output()
+	if err != nil || strings.TrimSpace(string(output)) == "" {
+		return "dev"
+	}
+	return strings.TrimSpace(string(output))
+}
+
+func replaceBinary(source, target string) error {
+	if err := os.Rename(source, target); err != nil {
+		return fmt.Errorf("install built binary: %w", err)
+	}
+	return nil
+}
+
+func runCommand(dir string, env []string, name string, args ...string) error {
+	command := exec.Command(name, args...)
+	command.Dir = dir
+	command.Env = env
+	command.Stdout = os.Stdout
+	command.Stderr = os.Stderr
+	return command.Run()
+}
+
+func withEnv(env []string, key, value string) []string {
+	prefix := key + "="
+	result := make([]string, 0, len(env)+1)
+	for _, entry := range env {
+		if !strings.HasPrefix(entry, prefix) {
+			result = append(result, entry)
+		}
+	}
+	return append(result, prefix+value)
+}