feat: short circuit composition support

[prsabahrami]

This automatically turns a task into an alias in case the below format is provided:

[tasks.test]
cmd = "pytest tests/{{ test-type }}"
args = ["test-type"]

[tasks]
test-all = [{ task = "test", args = ["all"] }]
# Equivalent to: test-all = { depends-on = [{task = "test", args = ["all"] }]}

[Hofer-Julian]

A few comments

[Hofer-Julian]

Let's add osx-arm64

[Hofer-Julian]

Let's also test pixi task alias --platform

[Hofer-Julian]

Amazing work Parsa 🥳🥳🥳