pyproject.toml formatting isn't preserved

[cnpryer]

Labeling this as a bug because, imo, its a ux problem. Technically huak could take an opinion on pyproject.toml formatting (which it still may, but it's undecided).

Using the following pyproject.toml

[project]
name = "mock_project"
version = "0.0.1"
description = ""
dependencies = [
    "click ==8.1.3",
]

[[project.authors]]
name = "Chris Pryer"
email = "[email protected]"

[project.optional-dependencies]
dev = [
    "pytest >=6",
    "black ==22.8.0",
    "isort ==5.12.0",
]

[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"

huak add xlcsv also updates the ordering of the tables

[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"

[project]
name = "mock_project"
version = "0.0.1"
description = ""
dependencies = [
    "click ==8.1.3",
    "xlcsv ==0.3.0",
]

[[project.authors]]
name = "Chris Pryer"
email = "[email protected]"

[project.optional-dependencies]
dev = [
    "pytest >=6",
    "black ==22.8.0",
    "isort ==5.12.0",
]

[cnpryer]

pyproject-toml-rs as a parser is nice, but from what I can tell trying to use it to also modify and write contents to files can be challending. See related PyO3/pyproject-toml-rs#10.

In #831 I'm using toml_edit, but I'm also thinking about situations with [tool] used:

[tool.huak]
toolchain = "3.12"