Make router:get-content-type-for-code() public

[ahenket]

In my code I want to know what content-type is requested in the Accept header compared to what I intend to support.

In the oas-router there is a perfectly fine function for it

router:get-content-type-for-code($config as map(*), $code as xs:integer, $fallback as xs:string)

but that function is %private.

Could that function be made public?

[ahenket]

Thanks. As we noted yesterday though: we now need to go through roaster module for everything.

While roaster:accepted-content-types() is there, roaster:get-content-type-for-code() is not. It seems to make sense to add function roaster:get-content-type-for-code() (as reroute to the router function)