I do have one concern, that I don't think has been mentioned here...she can not be allowed to go without eating at all for more than a day or two max...cats can quickly develop a condition called Hepatic Lipidosis...link describing Hepatic Lipidosis
So now, I know you are going to feel frustrated...but the point I am trying to make is that while you work to transition her to a balanced cat diet, she must eat *something*. It would be better for you to, as one member suggested, give her a small amt. of turkey diced into the canned food you've chosen, try turkey baby food (onion free...Gerber 2nd stage would be fine) mixed in with a canned food you want her to try. It seems to me, if I am not mis-remembering, she's been pretty consistent in refusing the Proplan and the SD. Why not try other brands?
California Natural Chicken and Rice dry has very few ingredients, and what it has are quality ingredients - here is a link to the ingredients page
and there is also a canned version. This site has a retail store locator so that if you want to try this, you can locate a store near you.
Consider trying Petguard, Active Life if you can find it - the chunky chicken or the chicken pate fricassee would probably be quite palatable to her -the chunky has real chunks of chicken as if you cooked it yourself, supplement with the vitamins and minerals she needs, the pate has a blended pate texture..
Or consider a home cooked diet (as your vet for a balanced recipe - if they don't have any to recommend, let me know as I can look up a few). The pluses to a homecooked diet (so long as you are careful to do the needed additives called for ) would allow you to choose fresh turkey as her protein.
So...the confusing bottom line is...she shouldn't be fed at the table, she shouldn't get just turkey, and she can't be allowed to just not eat at all - she seems pretty clear on rejecting the proplan and science diet - both of which contain by-products, and a quick look at the proplan chicken and rice shows it also uses whole corn, soy protein isolate...things she may well be reacting to.
Here is an article on hypoallergenic carbs for cats (and dogs)...I think you'd find it interesting to read: hypoallergenic carbs
I hope some of the above is helpful, I know right now this problem probably seems a bit overwhelming, but with a bit of detective work and persistence, you can get this gal eating what is good for her!