Feature: Add guide to install system dependencies with pixi

Describe the enhancement or feature you would like

I've stopped using brew on my macOS and I'm instead using pixi whenever I need system-level dependencies. This works very well in practice even for building CPython and I can do things like pixi run configure and it automatically sets up all of the system dependencies and runs configure. Doing that requires setting some environment variables here and there, but I've done that in a pixi.toml and it's all automated. It looks somewhat like this:

[project]
name = "cpython-dev"
channels = ["conda-forge"]
platforms = ["osx-arm64"]

[dependencies]
gdbm = "*"
libmpdec-devel = "*"
openssl = "3.*"
pkg-config = "*"
tk = "*"
xz = "*"
zstd = "*"
zlib = "*"

[tasks.configure]
cmd = "./configure --with-openssl=$CONDA_PREFIX"

[tasks.configure.env]
PKG_CONFIG_PATH = "$CONDA_PREFIX/lib/pkgconfig"
GDBM_CFLAGS = "-I$CONDA_PREFIX/include"
GDBM_LIBS = "-L$CONDA_PREFIX/lib -lgdbm"
TCLTK_CFLAGS = "$(pkg-config --cflags tcl tk)"
# tcl.pc and tk.pc files contain stub libraries, but those do not extist
# in the conda package
TCLTK_LIBS = "$(pkg-config --libs tcl tk | sed 's/-l[^ ]*stub[^ ]*//g')"
LDFLAGS = "-Wl,-rpath,$CONDA_PREFIX/lib"

It's a bit too much to propose adding this to the CPython repo, at least for now. However, pointing to this as a way to install system-level dependencies in the devguide doesn't sounds like a bad idea to me.

Thoughts? Is there an appetite for this? If so, I can start drafting a PR.

Describe alternatives you have considered

No response

Additional context

No response

先从 devguide 中现有的系统级依赖项安装指南开始，并将其与提议的 pixi.toml 工作流进行比较。添加一个简洁的基于 pixi 的选项或链接，涵盖 issue 中所示的依赖项和环境设置，然后确认开发环境设置说明完整且易于理解。