fix(more resources): fix porting and functionality [r8s-103] (#8)

Co-authored-by: testA113 <aliharriss1995@gmail.com>
Co-authored-by: Anthony Lapenna <anthony.lapenna@portainer.io>
Co-authored-by: Ali <83188384+testA113@users.noreply.github.com>

api/internal/errorlist/errorlist.go

@@ -0,0 +1,18 @@
+package errorlist
+
+import "errors"
+
+// Combine a slice of errors into a single error
+// to use this, generate errors by appending to errorList in a loop, then return combine(errorList)
+func Combine(errorList []error) error {
+	if len(errorList) == 0 {
+		return nil
+	}
+
+	errorMsg := "Multiple errors occurred:"
+	for _, err := range errorList {
+		errorMsg += "\n" + err.Error()
+	}
+
+	return errors.New(errorMsg)
+}