feat: errorlist helper

Author: SysIntruder

Diff for: helpers/errorlist/errorlist.go

@@ -0,0 +1,41 @@
+package errorlist
+
+import (
+	"fmt"
+)
+
+type ErrorList []error
+
+func (e ErrorList) Error() string {
+	s := ""
+
+	for idx, err := range e {
+		s = fmt.Sprintf("%d: %s\n", idx, err)
+	}
+
+	return s
+}
+
+// Append will append an error into [ErrorList]
+func (e ErrorList) Append(err error) ErrorList {
+	return append(e, err)
+}
+
+// New will create new instance of [ErrorList]
+//
+// use [nil] as parameter to create empty [ErrorList]
+//
+// use [Append] to add into [ErrorList]
+func New(err error) ErrorList {
+	if err == nil {
+		return make(ErrorList, 0)
+	}
+
+	if errl, ok := err.(ErrorList); ok {
+		return errl
+	}
+
+	e := make(ErrorList, 0)
+	e = append(e, err)
+	return e
+}