Not so much of an ang bao, but maybe a day off or half day morning wld be good.
For hari raya, in the morning, we go for prayers in the mosque. Sometimes after the prayers, there'll be a lil makan session at the mosque. Depend which mosque.
If your maid is new, maybe you can show her to the nearest mosque in your area.
A lil extra is that, maybe you can cater a small hari raya meal for your maid and your family as well. At least she won't feel so sad being away from family during hari raya.