validate toml documents

[chris48s]

Schemastore has some schemas for toml files e.g: https://json.schemastore.org/pyproject.json

Tasks:

• Add a toml parser: https://github.com/squirrelchat/smol-toml
• Use it to allow toml as an input format for documents https://github.com/chris48s/v8r/blob/d019edabb223e8ded611f06f804b15a1bdd93c92/src/parser.js#L4
• Add test cases for toml input

[chris48s]

@snoozethis wait until now

[SnoozeThis]

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