[feature request] Add declarative patch support similar to `nixtamal`

[kagurazakei]

i am truly want to see declarative patch support in tack. but now tack is featureful and really awesome project. so i completely migrate my config to tack. but i imagine tack support patch system it was awesome. now nixtamal is the only one support patch system in nix community pinning tool. but nixtamal is not my taste. so i make this feature request.

[Kruziikrel13]

That sounds baller af.