I've seen mods that add weight to arrows or make each shot use more arrows, buit never one that actually limits the number of arrows the player is allowed to carry.
Now I have no experience with the Creation Kit, and even though I considered making this mod myself I don't think I would be able to make a satisfying mod. I know this mod will require some coding, and I really, REALLY, svck at coding - so, I hope one of you guys, with your mad superior coding skills, is able to make this mod, or something like it. If you do that, you will be my hero and I will name children after you.