Support sparse checkout for package

[star-hengxing]

Is your feature request related to a problem? Please describe.

llvm is a monorepo, I just want to build llvm & clang.

add_urls("https://github.com/llvm/llvm-project.git", {includes = {"cmake", "clang", "llvm"})

Describe the solution you'd like

$ git clone --filter=tree:0 --no-checkout https://github.com/llvm/llvm-project.git llvm
$ cd llvm
$ git sparse-checkout init --cone
$ git sparse-checkout add llvm clang cmake
$ git checkout fac46469977da9c4e9c6eeaac21103c971190577

https://stackoverflow.com/questions/4114887/is-it-possible-to-do-a-sparse-checkout-without-checking-out-the-whole-repository

Describe alternatives you've considered

No response

Additional context

No response

[waruqi]

done #6072