Add multi line array options

[rasta-rocket]

Hi @pelletier 👋

It has been a while since my last PR #578 on this repo.

Well the goal here is to re add that feature in the v2 of go-toml and especially tomll

Explanation of what this pull request does.

The goal of this PR is to add a flag to the linter that allow us to render the TOML file with multilines array (meaning one line by element)

Don't hesitate if you need more details

Cheers 😉

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