Prefer named sink args to prevent overriding defaults set with show rule

[jamesrswift]

subpar/src/lib.typ

Lines 114 to 115 in cac5e07

	placement: placement,
	gap: gap,

By defining these to have a default value through the function signature, and passing them directly to figure, any values set through set/show rules are overridden. Taking sink arguments and destructuring named arguments into the parent figure should suitably retain control without applying defaults.

[tingerrr]

Hmm, I guess this makes sense to some degree. I initially went this route to ensure I can easily replicate the exact API of figure, from the allowed arguments to the type validation.

I'll probably change it then.