toml-ts-mode: first draft

[Jostein Kjønigsen]

Hey everyone.

I noticed that there’s no built in support for the TOML file format in Emacs and that currently one has to use a third-party MELPA-package to add support for that. 

Attached is a patch which adds support for TOML using tree-sitter fontification.

It has been tested with, and provides consistent fontification for the following syntax elements:

- bare headers & quoted headers

- single headers & dotted headers

- regular headers and array-element headers

- bare properties & dotted properties

- double-quoted strings and single-quoted strings

- single-line and multi-line strings

- escape-sequences in strings

- numeric values (all formats)

- date and time values (all formats)

- boolean values

- inline tables, with recursive support for all the above value types

- highlighting syntax errors 

It does not yet implement support for indentation as that is not commonly used/legal for this format. 

Feedback welcome!

--
Vennlig hilsen
Jostein Kjønigsen

jostein@kjonigsen.net 🍵 jostein@gmail.com
https://jostein.kjønigsen.no

0003-Introduce-support-for-TOML-config-format.patch
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