Add maxdop to Formatters

[pagebrooks]

Adds maxdop to the Formatters section.

A free, MIT-licensed, open-source T-SQL formatter.

• Built on Microsoft's own T-SQL parser (ScriptDom), so stored procedures, GO batches and older dialects are parsed rather than pattern-matched.
• One static binary for editor, command line, or CI (maxdop --check src/). No runtime to install.
• Re-parses its own output and compares it against the input before writing, and returns the file untouched if anything differs.