Remove HTTP::UserAgent

[coke]

Rework util/create-brackets-table.raku to use Cro::HTTP::Client to avoid two similar-but-different dependencies.

[lizmat]

why not simplify to using curl ?

[coke]

Sure - if we do that, we can remove both modules instead of keeping one.

[coke]

Sure - if we do that, we can remove both modules instead of keeping one.

... But then we depend on an external program - can we add that to the META6 deps or is it just an external dependency at that point?