Who will be looking after her when you return to work? Will you still have her part time?
You could continue feeding to sleep and let your caregiver get on with whatever they want to do. You'd be amazed how babies adapt to what their caregivers do and nap for them like they would not for parents.
Alternatively if you've generally had it with feeding to sleep, you need to change what happens, even if she complains a bit!
I'd start a routine for going up to nap - eg lunch, then straight upstairs, story then feed and put down before she's asleep. If she cries you could stay and pat or sing, or else pop in and out, sit in the room but don't go to her etc. I think sometimes having you right next to the cot makes it more frustrating.
If you're consistent with it, most likely she'll start going to sleep easily enough and you can then drop the feed out of the routine once she's used to it. If she really rails against it then you could try walking her to sleep in the pram.
I don't think there's a magic way to shift her from feeding to sleep to going in her cot, just like that - you need to change her habits and she'll probably be unsure about it at first and complain a bit. Making sure she has lots of air and exercise and a good lunch might help.