feature: Support TODO(username) & TODO(@username) comments out of the box

[asciimoth]

Did you check the docs?

• I have read all the todo-comments.nvim docs

Is your feature request related to a problem? Please describe.

Comments like TODO(username) and TODO(@username) are widely usable in collaborative development but not supported by default in todo-comments.

Describe the solution you'd like

It makes sense to highlight them out of the box instead of making user to write custom regexps.

Describe alternatives you've considered

Writing custom highlight.pattern

Additional context

No response

[galenseilis]

I would love this. It would go well with Ruff's TD002 rule.