numeric and money should only allow ${number} like Int8String

[felixfbecker]

money currently accepts string | number in Insertables and returns string in Selectables.
numeric, which is a fixed-decimal type just like money, currently only accepts number (resulting in potential loss of precision) and returns number in Selectables (which is incorrect).

These should both return a db.NumericString that is defined like below (just like Int8String already does) and both accept db.NumericString | number on input.

type NumericString = `${number}`