I would strongly NOT recommend letting your daughter cry-it-out. After all the bonding, security and comfort that you have created over the last 11 months why tear that away now? Leaving a baby to cry crushes their entire sense of security and what they believed. They are still babies, certainly at only 6 mo and still at only 11 months old.... Still functioning on their natural instinct to cry out to Mommy when they have a need. Unfortunately, many parents, grandparents and well-meaning advisors don't think that babies have emotional or comfort measure NEEDS, and since they see these needs as only 'wants', they will recommend or justify ignoring them and not providing for these needs when it isn't convenient- which is generally at night when parents prefer to turn their babies to 'OFF' and get their full desired nights sleep. Babies have many more needs to nursing or wanting another human close to them at night other than nutrition, so even though babies or toddlers are eating solids, it dies not take away their other needs at night for emotional comfort, security, closeness, etc. Kids mature and develop at their own rates in these areas and although many parents of convenience will force thier own schedules on their babies, it doesn't change that childs need for comfort and security, they just won't get it because it's not convenient at 2 am.
Cosleeping is certainly NOT a bad habit at all!!!! The US is one of only a few places that encourages mothers to leave their babies alone all night seperate from them. To many parents in other countries, we are weird! Babies are meant to be with parents, you are fine! If you really want to start moving her, do it gradually, like putting a crib next to your bed with the side rail down so she is starting to experience her own space but is close enough to still tend to. Maybe start with brief alone time intervals after she has already doses off next to you by transferring her then, once in a deep sleep but allowing her back next to you if she wakes for you. I recommend looking at DR. Sears book called Night time Parenting or Jay Gordons book called Good Nights.... Both talk about the excellent benefits of cosleeping but also give advise, pointers and how-to info on changing gently to seperate sleeping arrangements, especially for nursing moms!
I also suspect that your daughter is playing catch-up on both the comfort and closeness of special Mommy time and also the breastmilk ( which is still so very very beneficial at her age!) once you get home from work. Since you two are seperated for so many hours each day/week she has no other chance to reconnect and pull you back in to refuel her comfort needs. As much work as it is, as a mom it must be so special to know that it is closeness with you, bonding, together time and nursing that she looks for to reconnect and relax/feel secure! What a feeling :-) As tiring as it is, I personally would continue to provide her with what she needs at night since it is her only chance with you most weekdays. If you were home all day everyday with her, then I'd agree to start limiting the night requests a little, but that's just not the case for you guys. Just remember that she will only be little once and this stage will all be behind you soon enough, without the battles or forced changes before she's natually ready. Best wishes to both of you!