If you are sharing a bathroom then you need to tell your daughter to remove her dirty clothes, or you could simply move them down into her laundry room If not, the matter is more complicated.
Perhaps I misunderstood, and it is not dirty clothes, although if clothes have been lying in one place for two years they can't be all that clean now.
A crawl space is not designed to act as a storage room. It's function is to allow air to circulate under the house, so tell your daughter nicely that in order to prevent rot or vermin, you and she will need to move everything that is in the crawl space somewhere else. Tell her, you will help with this.
You say she is working 36 hours a week in three twelve hours shifts, so it is only reasonable to help her with this.
Dirty dishes will attract mice or cockroaches or both, both unpleasant and a health hazard.
If however she refuses to clear any of this away, you will either have to ask her to move, thus damaging your relationship with her, or put up with her habits, but you are certainly entitled to ask her not to encroach on your part of the house with her mess.
As your daughter she can hardly be surprised that you have different standards.