Pnpm suppport (#6)

* fix: resolves issues #3 and #4

* feat: add pnpm support & introduce pkg manager wrap for npm

pkg/common/utils/config.go

@@ -1,6 +1,10 @@
 package utils
 
-import "os"
+import (
+	"fmt"
+	"os"
+	"strings"
+)
 
 func ApiKey() string {
 	return os.Getenv("SAFEDEP_API_KEY")
@@ -13,3 +17,35 @@ func TenantDomain() string {
 func NpmAuthToken() string {
 	return os.Getenv("NPM_AUTH_TOKEN")
 }
+
+func ValidateEnvVars() error {
+	apiKey := ApiKey()
+	tenantId := TenantDomain()
+	var missingVars []string
+
+	if apiKey == "" {
+		missingVars = append(missingVars, "SAFEDEP_API_KEY")
+	}
+	if tenantId == "" {
+		missingVars = append(missingVars, "SAFEDEP_TENANT_ID")
+	}
+
+	if len(missingVars) > 0 {
+		return fmt.Errorf(`
+SafeDep configuration incomplete
+
+Missing environment variables:
+  %s
+
+To enable package scanning:
+  1. Export these variables in your terminal:
+     export %s=your_api_key
+     export %s=your_tenant_id
+  2. Or add them to your shell profile file
+
+For more information, visit: https://docs.safedep.io/cloud/quickstart
+`, strings.Join(missingVars, "\n  "), missingVars[0], missingVars[len(missingVars)-1])
+	}
+
+	return nil
+}