Add editor packages

internal/editor/event/error.go

@@ -0,0 +1,19 @@
+package event
+
+import "time"
+
+type Error struct {
+	error
+	t time.Time
+}
+
+func (e *Error) Time() time.Time {
+	return e.t
+}
+
+func NewError(err error) *Error {
+	return &Error{
+		error: err,
+		t:     time.Now(),
+	}
+}